Contact us
Choose a category below so we can get back to you as quickly as possible.
這個正方形是圓內的一個最大的正方形吧! 16開平方=4分米,這就是圓的直徑,則半徑為2分米,圓面積是2*2*3.14=12.56平方分米. 20開平=4.48分米,圓面積是:4.48*3.14=14.07平方分米.
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.