Function equilateralFromVertex

equilateralFromVertex(
    origin?: Geometry.Point,
    length?: number,
    angleRadian?: number,
): Triangle
Returns a triangle anchored at origin with a given length and angleRadian. The origin will be point b of the triangle, and the angle will be the angle for b.
Parameters
- Optionalorigin: Geometry.Point
  Origin
- length: number = 10
  Length
- angleRadian: number = ...
  Angle
Returns Triangle