Contact us
Choose a category below so we can get back to you as quickly as possible.
正方形面積=(周長/4)^2=(16/25/4)^2=16/625
派取3.14好了.設圓半徑為r,則正方形變長為2r,所以2r的平方减去3.14乘以r的平方,先算乘法,等於12.9,所以r的平方為15,所以圓面積為3.14乘以15等於47.1.
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.