Contact us
Choose a category below so we can get back to you as quickly as possible.
從任意一個頂點引一條線段到對邊就可以是三個三角形了 從任意一個頂點引兩條線段到對邊就可以是六個三角形了 只不過這些三角形是重疊在一起的
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.