Contact us
Choose a category below so we can get back to you as quickly as possible.
在一個長15cm,寬是10cm的長方形上畫一個最大的圓,它的直徑是【10】cm,面積是【25x3.14=78.5】cm.
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.