Contact us
Choose a category below so we can get back to you as quickly as possible.
求圓的周長是用半徑或直徑都可以.因為圓的周長:C=πd或C=2πr,簡單的說用半徑比用直徑多乘以2,就可以了. 求圓的面積是用半徑.因為圓的面積:S=πr²;
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.