// Define the id of your board in BOARDID
const board = JXG.JSXGraph.initBoard(BOARDID, {
boundingbox: [-6, 6, 6, -6],
grid: true
});
var n = board.create('slider', [
[-5, 5],
[4, 5],
[3, 4, 96]
], {
name: 'n',
snapWidth: 1
});
var p0 = board.create('point', [0, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var p1 = board.create('point', [4, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var rot = board.create('transform', [function() {
return Math.PI * 2.0 / n.Value();
}, p0], {
type: 'rotate'
}); // angle, rotation center
var ptmp = board.create('point', [0, 0], {
visible: false,
withLabel: false
}); // dummy point for the rotation
var cOut = board.create('curve', [
[0],
[0]
], {
fillColor: '#5e9abf',
highlightFillColor: '#5e9abf',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var circ = board.create('circle', [p0, p1], {
fillColor: '#fefd4c',
highlightFillColor: '#fefd4c',
fillOpacity: 0.5,
highlightFillOpacity: 0.5,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var cIn = board.create('curve', [
[0, 1, 2],
[0, 1, 2]
], {
fillColor: '#d769a3',
highlightFillColor: '#d769a3',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var tCirc = board.create('text', [-5, -4.0, function() {
return 'Area of the circle = ' + (0.0625 * circ.getRadius() * circ.getRadius() * Math.PI).toFixed(5);
}], {
fontSize: 16
});
var tIn = board.create('text', [-5, -4.5, function() {
return 'Area of the inscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.sin(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
var tOut = board.create('text', [-5, -5, function() {
return 'Area of the circumscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.tan(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
cIn.updateDataArray = function() {
var i, len = n.Value();
this.dataX = [p0.X() + circ.getRadius()];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + circ.getRadius(), p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
cOut.updateDataArray = function() {
var i, len = n.Value();
var s = circ.getRadius() / Math.cos(Math.PI / n.Value());
this.dataX = [p0.X() + s];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + s, p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
board.update();
This example is licensed under a Creative Commons Attribution 4.0 International License.
Please note that you have to mention The Center of Mobile Learning with Digital Technology in the credits.
/*
This example is licensed under a
Creative Commons Attribution 4.0 International License.
https://creativecommons.org/licenses/by/4.0/
Please note that you have to mention
The Center of Mobile Learning with Digital Technology
in the credits.
*/
const BOARDID = 'your_div_id'; // Insert your id here!
const board = JXG.JSXGraph.initBoard(BOARDID, {
boundingbox: [-6, 6, 6, -6],
grid: true
});
var n = board.create('slider', [
[-5, 5],
[4, 5],
[3, 4, 96]
], {
name: 'n',
snapWidth: 1
});
var p0 = board.create('point', [0, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var p1 = board.create('point', [4, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var rot = board.create('transform', [function() {
return Math.PI * 2.0 / n.Value();
}, p0], {
type: 'rotate'
}); // angle, rotation center
var ptmp = board.create('point', [0, 0], {
visible: false,
withLabel: false
}); // dummy point for the rotation
var cOut = board.create('curve', [
[0],
[0]
], {
fillColor: '#5e9abf',
highlightFillColor: '#5e9abf',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var circ = board.create('circle', [p0, p1], {
fillColor: '#fefd4c',
highlightFillColor: '#fefd4c',
fillOpacity: 0.5,
highlightFillOpacity: 0.5,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var cIn = board.create('curve', [
[0, 1, 2],
[0, 1, 2]
], {
fillColor: '#d769a3',
highlightFillColor: '#d769a3',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var tCirc = board.create('text', [-5, -4.0, function() {
return 'Area of the circle = ' + (0.0625 * circ.getRadius() * circ.getRadius() * Math.PI).toFixed(5);
}], {
fontSize: 16
});
var tIn = board.create('text', [-5, -4.5, function() {
return 'Area of the inscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.sin(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
var tOut = board.create('text', [-5, -5, function() {
return 'Area of the circumscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.tan(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
cIn.updateDataArray = function() {
var i, len = n.Value();
this.dataX = [p0.X() + circ.getRadius()];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + circ.getRadius(), p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
cOut.updateDataArray = function() {
var i, len = n.Value();
var s = circ.getRadius() / Math.cos(Math.PI / n.Value());
this.dataX = [p0.X() + s];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + s, p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
board.update();
<div id="board-0-wrapper" class="jxgbox-wrapper " style="width: 100%; ">
<div id="board-0" class="jxgbox" style="aspect-ratio: 1 / 1; width: 100%;" data-ar="1 / 1"></div>
</div>
<script type = "text/javascript">
/*
This example is licensed under a
Creative Commons Attribution 4.0 International License.
https://creativecommons.org/licenses/by/4.0/
Please note that you have to mention
The Center of Mobile Learning with Digital Technology
in the credits.
*/
const BOARDID = 'board-0';
const board = JXG.JSXGraph.initBoard(BOARDID, {
boundingbox: [-6, 6, 6, -6],
grid: true
});
var n = board.create('slider', [
[-5, 5],
[4, 5],
[3, 4, 96]
], {
name: 'n',
snapWidth: 1
});
var p0 = board.create('point', [0, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var p1 = board.create('point', [4, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var rot = board.create('transform', [function() {
return Math.PI * 2.0 / n.Value();
}, p0], {
type: 'rotate'
}); // angle, rotation center
var ptmp = board.create('point', [0, 0], {
visible: false,
withLabel: false
}); // dummy point for the rotation
var cOut = board.create('curve', [
[0],
[0]
], {
fillColor: '#5e9abf',
highlightFillColor: '#5e9abf',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var circ = board.create('circle', [p0, p1], {
fillColor: '#fefd4c',
highlightFillColor: '#fefd4c',
fillOpacity: 0.5,
highlightFillOpacity: 0.5,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var cIn = board.create('curve', [
[0, 1, 2],
[0, 1, 2]
], {
fillColor: '#d769a3',
highlightFillColor: '#d769a3',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var tCirc = board.create('text', [-5, -4.0, function() {
return 'Area of the circle = ' + (0.0625 * circ.getRadius() * circ.getRadius() * Math.PI).toFixed(5);
}], {
fontSize: 16
});
var tIn = board.create('text', [-5, -4.5, function() {
return 'Area of the inscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.sin(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
var tOut = board.create('text', [-5, -5, function() {
return 'Area of the circumscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.tan(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
cIn.updateDataArray = function() {
var i, len = n.Value();
this.dataX = [p0.X() + circ.getRadius()];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + circ.getRadius(), p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
cOut.updateDataArray = function() {
var i, len = n.Value();
var s = circ.getRadius() / Math.cos(Math.PI / n.Value());
this.dataX = [p0.X() + s];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + s, p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
board.update();
</script>
<jsxgraph width="100%" aspect-ratio="1 / 1" title="Archimedian circle approximation" description="This construction was copied from JSXGraph examples database: http://jsxgraph.uni-bayreuth.de/share/" useGlobalJS="false">
/*
This example is licensed under a
Creative Commons Attribution 4.0 International License.
https://creativecommons.org/licenses/by/4.0/
Please note that you have to mention
The Center of Mobile Learning with Digital Technology
in the credits.
*/
const board = JXG.JSXGraph.initBoard(BOARDID, {
boundingbox: [-6, 6, 6, -6],
grid: true
});
var n = board.create('slider', [
[-5, 5],
[4, 5],
[3, 4, 96]
], {
name: 'n',
snapWidth: 1
});
var p0 = board.create('point', [0, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var p1 = board.create('point', [4, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var rot = board.create('transform', [function() {
return Math.PI * 2.0 / n.Value();
}, p0], {
type: 'rotate'
}); // angle, rotation center
var ptmp = board.create('point', [0, 0], {
visible: false,
withLabel: false
}); // dummy point for the rotation
var cOut = board.create('curve', [
[0],
[0]
], {
fillColor: '#5e9abf',
highlightFillColor: '#5e9abf',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var circ = board.create('circle', [p0, p1], {
fillColor: '#fefd4c',
highlightFillColor: '#fefd4c',
fillOpacity: 0.5,
highlightFillOpacity: 0.5,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var cIn = board.create('curve', [
[0, 1, 2],
[0, 1, 2]
], {
fillColor: '#d769a3',
highlightFillColor: '#d769a3',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var tCirc = board.create('text', [-5, -4.0, function() {
return 'Area of the circle = ' + (0.0625 * circ.getRadius() * circ.getRadius() * Math.PI).toFixed(5);
}], {
fontSize: 16
});
var tIn = board.create('text', [-5, -4.5, function() {
return 'Area of the inscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.sin(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
var tOut = board.create('text', [-5, -5, function() {
return 'Area of the circumscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.tan(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
cIn.updateDataArray = function() {
var i, len = n.Value();
this.dataX = [p0.X() + circ.getRadius()];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + circ.getRadius(), p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
cOut.updateDataArray = function() {
var i, len = n.Value();
var s = circ.getRadius() / Math.cos(Math.PI / n.Value());
this.dataX = [p0.X() + s];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + s, p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
board.update();
</jsxgraph>
/*
This example is licensed under a
Creative Commons Attribution 4.0 International License.
https://creativecommons.org/licenses/by/4.0/
Please note that you have to mention
The Center of Mobile Learning with Digital Technology
in the credits.
*/
const BOARDID = 'your_div_id'; // Insert your id here!
const board = JXG.JSXGraph.initBoard(BOARDID, {
boundingbox: [-6, 6, 6, -6],
grid: true
});
var n = board.create('slider', [
[-5, 5],
[4, 5],
[3, 4, 96]
], {
name: 'n',
snapWidth: 1
});
var p0 = board.create('point', [0, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var p1 = board.create('point', [4, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var rot = board.create('transform', [function() {
return Math.PI * 2.0 / n.Value();
}, p0], {
type: 'rotate'
}); // angle, rotation center
var ptmp = board.create('point', [0, 0], {
visible: false,
withLabel: false
}); // dummy point for the rotation
var cOut = board.create('curve', [
[0],
[0]
], {
fillColor: '#5e9abf',
highlightFillColor: '#5e9abf',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var circ = board.create('circle', [p0, p1], {
fillColor: '#fefd4c',
highlightFillColor: '#fefd4c',
fillOpacity: 0.5,
highlightFillOpacity: 0.5,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var cIn = board.create('curve', [
[0, 1, 2],
[0, 1, 2]
], {
fillColor: '#d769a3',
highlightFillColor: '#d769a3',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var tCirc = board.create('text', [-5, -4.0, function() {
return 'Area of the circle = ' + (0.0625 * circ.getRadius() * circ.getRadius() * Math.PI).toFixed(5);
}], {
fontSize: 16
});
var tIn = board.create('text', [-5, -4.5, function() {
return 'Area of the inscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.sin(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
var tOut = board.create('text', [-5, -5, function() {
return 'Area of the circumscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.tan(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
cIn.updateDataArray = function() {
var i, len = n.Value();
this.dataX = [p0.X() + circ.getRadius()];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + circ.getRadius(), p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
cOut.updateDataArray = function() {
var i, len = n.Value();
var s = circ.getRadius() / Math.cos(Math.PI / n.Value());
this.dataX = [p0.X() + s];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + s, p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
board.update();
<div id="board-0-wrapper" class="jxgbox-wrapper " style="width: 100%; ">
<div id="board-0" class="jxgbox" style="aspect-ratio: 1 / 1; width: 100%;" data-ar="1 / 1"></div>
</div>
<script type = "text/javascript">
/*
This example is licensed under a
Creative Commons Attribution 4.0 International License.
https://creativecommons.org/licenses/by/4.0/
Please note that you have to mention
The Center of Mobile Learning with Digital Technology
in the credits.
*/
const BOARDID = 'board-0';
const board = JXG.JSXGraph.initBoard(BOARDID, {
boundingbox: [-6, 6, 6, -6],
grid: true
});
var n = board.create('slider', [
[-5, 5],
[4, 5],
[3, 4, 96]
], {
name: 'n',
snapWidth: 1
});
var p0 = board.create('point', [0, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var p1 = board.create('point', [4, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var rot = board.create('transform', [function() {
return Math.PI * 2.0 / n.Value();
}, p0], {
type: 'rotate'
}); // angle, rotation center
var ptmp = board.create('point', [0, 0], {
visible: false,
withLabel: false
}); // dummy point for the rotation
var cOut = board.create('curve', [
[0],
[0]
], {
fillColor: '#5e9abf',
highlightFillColor: '#5e9abf',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var circ = board.create('circle', [p0, p1], {
fillColor: '#fefd4c',
highlightFillColor: '#fefd4c',
fillOpacity: 0.5,
highlightFillOpacity: 0.5,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var cIn = board.create('curve', [
[0, 1, 2],
[0, 1, 2]
], {
fillColor: '#d769a3',
highlightFillColor: '#d769a3',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var tCirc = board.create('text', [-5, -4.0, function() {
return 'Area of the circle = ' + (0.0625 * circ.getRadius() * circ.getRadius() * Math.PI).toFixed(5);
}], {
fontSize: 16
});
var tIn = board.create('text', [-5, -4.5, function() {
return 'Area of the inscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.sin(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
var tOut = board.create('text', [-5, -5, function() {
return 'Area of the circumscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.tan(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
cIn.updateDataArray = function() {
var i, len = n.Value();
this.dataX = [p0.X() + circ.getRadius()];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + circ.getRadius(), p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
cOut.updateDataArray = function() {
var i, len = n.Value();
var s = circ.getRadius() / Math.cos(Math.PI / n.Value());
this.dataX = [p0.X() + s];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + s, p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
board.update();
</script>
<jsxgraph width="100%" aspect-ratio="1 / 1" title="Archimedian circle approximation" description="This construction was copied from JSXGraph examples database: http://jsxgraph.uni-bayreuth.de/share/" useGlobalJS="false">
/*
This example is licensed under a
Creative Commons Attribution 4.0 International License.
https://creativecommons.org/licenses/by/4.0/
Please note that you have to mention
The Center of Mobile Learning with Digital Technology
in the credits.
*/
const board = JXG.JSXGraph.initBoard(BOARDID, {
boundingbox: [-6, 6, 6, -6],
grid: true
});
var n = board.create('slider', [
[-5, 5],
[4, 5],
[3, 4, 96]
], {
name: 'n',
snapWidth: 1
});
var p0 = board.create('point', [0, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var p1 = board.create('point', [4, 0], {
strokeColor: 'black',
fillColor: 'white',
name: ''
});
var rot = board.create('transform', [function() {
return Math.PI * 2.0 / n.Value();
}, p0], {
type: 'rotate'
}); // angle, rotation center
var ptmp = board.create('point', [0, 0], {
visible: false,
withLabel: false
}); // dummy point for the rotation
var cOut = board.create('curve', [
[0],
[0]
], {
fillColor: '#5e9abf',
highlightFillColor: '#5e9abf',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var circ = board.create('circle', [p0, p1], {
fillColor: '#fefd4c',
highlightFillColor: '#fefd4c',
fillOpacity: 0.5,
highlightFillOpacity: 0.5,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var cIn = board.create('curve', [
[0, 1, 2],
[0, 1, 2]
], {
fillColor: '#d769a3',
highlightFillColor: '#d769a3',
fillOpacity: 1,
highlightFillOpacity: 1,
strokeColor: 'black',
highlightStrokeColor: 'black'
});
var tCirc = board.create('text', [-5, -4.0, function() {
return 'Area of the circle = ' + (0.0625 * circ.getRadius() * circ.getRadius() * Math.PI).toFixed(5);
}], {
fontSize: 16
});
var tIn = board.create('text', [-5, -4.5, function() {
return 'Area of the inscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.sin(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
var tOut = board.create('text', [-5, -5, function() {
return 'Area of the circumscribed ' + n.Value().toFixed(0) + '-polygon = ' + (0.0625 * n.Value() * circ.getRadius() * circ.getRadius() * Math.tan(Math.PI / n.Value())).toFixed(5);
}], {
fontSize: 16
});
cIn.updateDataArray = function() {
var i, len = n.Value();
this.dataX = [p0.X() + circ.getRadius()];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + circ.getRadius(), p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
cOut.updateDataArray = function() {
var i, len = n.Value();
var s = circ.getRadius() / Math.cos(Math.PI / n.Value());
this.dataX = [p0.X() + s];
this.dataY = [p0.Y()];
ptmp.setPositionDirectly(JXG.COORDS_BY_USER, [p0.X() + s, p0.Y()]);
for (i = 0; i < len; i++) {
rot.applyOnce(ptmp);
this.dataX.push(ptmp.X());
this.dataY.push(ptmp.Y());
}
}
board.update();
</jsxgraph>