RotateAroundPoint = function (triangle, point, angle)
{
    return RotateAroundXY(triangle, point.x, point.y, angle);
}
Rotates a Triangle at a certain angle about a given Point or object with public `x` and `y` properties.

@function Phaser.Geom.Triangle.RotateAroundPoint
@since 3.0.0

@generic {Phaser.Geom.Triangle} O - [triangle,$return]

@param {Phaser.Geom.Triangle} triangle - The Triangle to rotate.
@param {Phaser.Geom.Point} point - The Point to rotate the Triangle about.
@param {number} angle - The angle by which to rotate the Triangle, in radians.

@return {Phaser.Geom.Triangle} The rotated Triangle.