Contact us
Choose a category below so we can get back to you as quickly as possible.
扇形的面積公式: S扇=(lR)/2(l為扇形弧長) 即弧長*半徑/2 或者為S扇=(n/360)πR^2(n為圓心角的度數) 即扇形的面積=圓的面積*圓心角的度數/360
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.