Contact us
Choose a category below so we can get back to you as quickly as possible.
30°角所對直角邊是斜邊的一半 60°角所對直角邊是30°角所對直角邊的根號3倍 30°角所對直角邊∶60°角所對直角邊∶斜邊=1∶√3∶2
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.