Contact us
Choose a category below so we can get back to you as quickly as possible.
用寬做種方形的邊長,它的面積做大 正方形的面積是20*20=400平方釐米
(36-20)×20 =16×20 =320(平方釐米)
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.