area of a circle英语 标准发音:area of a circle 英式发音: 美式发音: 翻译中文 圆的面积 area of a circle - 基本释义[词典1] 圆的面积 圆面积 area of a circle - WEB词典 area of a circle 圆面积 圆的面积 area formula of a circle 圆面积公式 参考资料: 1.百度翻译:area of a circle 2....
You can use the circumference of a circle How to find the area of a circle using the radius The radius of a circle is the distance from the center of the circle to a point on the circle. Once you know this distance, you simply need to substitute the known value for r in the formul...
The area of a circle is 12.56cm. If the radius of the circle is the same as the diagonal of a square, what is the area of the square? (Take π=3.14) 一个圆形的面积为12.56厘米.若正方形的对角线和圆形的半径相同.求该正方形的面积.(取π=3.14) 相关知识点: 试题来源: 解析 2. 12.5...
The area of a circle is:π (Pi) times the Radius squared:A = π r2 or, when you know the Diameter:A = (π/4) × D2 or, when you know the Circumference:A = C2 / 4πExample: What is the area of a circle with radius of 3 m ? Radius = r = 3 Area= π r2 = π× ...
The area of a circle is 36π square meters. What's the radius of the circle? A. 6 meters B. 8 meters C. 10 meters D. 12 meters 相关知识点: 试题来源: 解析 A。本题考查圆的面积公式。圆的面积公式是πr²,已知面积是 36π,那么 r²=36,r=6,所以答案是 A。B 选项不是圆半径...
Calculate the area of a circle using the radius, diameter, or circumference with the circle area calculator. Radius: Diameter: Circumference: Area: Reset Add this calculator to your site On this page: Calculator How to Calculate the Area of a Circle Circle Area Formulas Find ...
How to find the area of a circle: The area of a circle can be found by multiplying pi ( π = 3.14) by the square of the radius If a circle has a radius of 4, its area is 3.14*4*4=50.24 If you know the diameter, the radius is 1/2 as large. ...
A circle has a diameter of 12 cm. What is the area of the circle? A. 12π cm² B. 24π cm² C. 36π cm² D. 48π cm² 相关知识点: 试题来源: 解析 C。圆的面积公式为πr²,直径是 12cm,半径就是 6cm,面积为π×6²=36πcm²,A 选项结果错误,B 选项结果错误,D ...
So, what is the area formula for a rectangle, a triangle and a circle? Learn how to calculate the area for each using the area formulas in the examples below. How to Calculate the Area of a Rectangle Need to know what size rug to buy? Calculate the area of your rectangular space ...
The area of a circle with radius 4 cm is ___. A. 8π cm² B. 12π cm² C. 16π cm² D. 20π cm² 相关知识点: 试题来源: 解析 C。圆的面积等于πr²,半径为 4 厘米,面积是π×4²=16π 平方厘米。A 选项半径为 2 倍根号 2 厘米的圆面积约为 8π 平方厘米;...