Contact us
Choose a category below so we can get back to you as quickly as possible.
先量出扇形的母線L,用直尺. 再量出扇形的弧長,可以用卷尺. 弧長=錐體底面圓形的周長,由此可以算出圓的半徑.然後能求出地面圓的面積. 扇形的面積是S=1/2L*弧長.
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.