“星形线”造句

三角星形线的两条互相垂直的法线的交点在哪里?
Construct two mutually orthogonal tangents of the deltoid. Where do they meet?

2三角星形线的两条互相垂直的切线的交点在哪里?
Construct the part of the tangent of the deltoid intercepted by the curve.

• #星形线