// Define the id of your board in BOARDID
const board = JXG.JSXGraph.initBoard(BOARDID, {
boundingbox: [-5, 5, 5, -5]
});
var p = [], l = [], i = [], c = [], j = [], k, cc;
// Blue points
var attr = {
name: '',
color: '#7355ff'
};
p[0] = board.create('point', [-2.5, -3], attr);
p[1] = board.create('point', [-0, 4], attr);
p[2] = board.create('point', [2.5, -3], attr);
p[3] = board.create('point', [-4, 0], attr);
p[4] = board.create('point', [4, 0], attr);
for (k = 0; k < 5; k++) {
l[k] = board.create('segment', [p[k], p[(k + 1) % 5]], {strokeColor: 'black', strokeWidth: 1});
}
// Intersection points: yellow
for (k = 0; k < 5; k++) {
i[k] = board.create('intersection', [l[k], l[(k + 2) % 5], 0], {name: '', color: '#EAEA00'});
}
for (k = 0; k < 5; k++) {
c[k] = board.create('circumcircle', [p[k], i[k], i[(k + 2) % 5]], {
strokeColor: 'gray', strokeWidth: 1,
point: {
visible: false
}
});
}
// Intersection points: red
for (k = 0; k < 5; k++) {
j[k] = board.create('intersection', [c[k], c[(k + 2) % 5], 0], {name: '', color: '#EA0000'});
}
// 6th circle: circumcircle
cc = board.create('circumcircle', [j[0], j[2], j[3]], {
strokeColor: 'red',
strokeWidth: 2,
point: {
strokeColor: '#000000',
fillColor: '#000000',
size: 1
}
});