Function threePointAngleMin

Example

const threePointAngleMin = Fig.threePointAngleMin;
const getPoint = Fig.getPoint;

const p1 = threePointAngleMin(getPoint([1, 0]), getPoint([0, 0]), getPoint([0, 1]));
console.log(p1);
// 1.5707963267948966

const p2 = threePointAngleMin(getPoint([0, 1]), getPoint([0, 0]), getPoint([1, 0]));
console.log(p2);
// -1.5707963267948966
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