俩定理都有用，第七次作业中我会，给你们简单的问题，用到垂直轴定理。

So both are useful, and in assignment 7 I'll give you a simple problem so that you can apply the perpendicular axis theorem.

youdao

俩定理都有用，第七次作业中我会，给你们简单的问题，用到垂直轴定理。

So both are useful, and in assignment 7 I'll give you a simple problem so that you can apply the perpendicular axis theorem.

youdao