Contact us
Choose a category below so we can get back to you as quickly as possible.
1.如果兩個角互為對頂角,那麼它們相等 2.沒用逆定理,如果兩個角是45度,那麼他們相等
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.