25 Given that the area of a circle with radius 10 cm is equal to the area of a sector with centralangle 40°, then the radius of the sector iscm. 38. Given that the radius of a sector is r, with a central angle of n, the area of thissector is 反馈...
The area of a circle with a radius of 5 cm is ___. A. 25π cm² B. 10π cm² C. 5π cm² D. 75π cm² 相关知识点: 试题来源: 解析 A。本题考查圆的面积计算公式,圆的面积 = π×半径²。半径为 5cm,所以面积为 25π cm²。选项 B 计算错误,应为 25π cm...
A circle is the set of all those points in a plane whose distance from the fixed point remains constant. The fixed point is called thecentreof the circle and the constant distance is known as theradiusof the circle. The line segment passing through the centre of a circle and having its ...
Circle Calculator Inputs: Radius:or Diameteror Circumference: Unit:inchesfeetyardsmileskilometersmeterscentimetersmillimeters Calculate Area Result: Thearea of a circlewithradius65is13270 Formulae: r = 65d = 130C = 408 A = πr2= π(d2)2 ...
You can find the diameter of a circle by multiplying the radius of a circle by two: Diameter = 2 × Radius The formula to calculate the area of a circle using radius is as follows: Area of a circle = π× r2 And, to calculate the area of a circle using diameter use the following...
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;...
Find the area of a circle with a radius of 7 units.搜索 题目 Find the area of a circle with a radius of 7 units. 答案 解析 null 本题来源 题目:Find the area of a circle with a radius of 7 units. 来源: 越分练习题 收藏 反馈 分享...
The fixed point inside the periphery is known as the center while the constant distance of this point from the circumference is termed the radius of the circle. Let us suppose r be the radius of a circular geometry then its area is given by the below formula: ...
Oh honey, believe me, I'll tell you how it is! ProfBot I will give you the most educated answer. BobBot I'm so happy you are here. I'd love to help :) Add your answer: Earn +20pts Q:What is the area of a circle with a radius of 15?
Area of a circle equals pi (~3.14) multiplied by the radius squared. So to find the area of that circle your equation is (3.14)(3)^2 which equals approximately 27.