Given that the radius of a circle is 10cm, find the circumference and the area of the circle. (π=3.14) 答案 62.8cm, 314cm2.Circumference:2πr=2×3.14×10=62.8(cm),area:πr2=3.14×102=314(cm2).相关推荐 1Given that the radius of a circle is 10cm, find the circumference and th...
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;...
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...
百度试题 结果1 题目 What is the area of a circle whose radius is thediagonal of a square whose area is 4 ?(A22BCA. 2元B. 2πyC. 4元D.8πE. 16π 相关知识点: 试题来源: 解析 D 反馈 收藏
Area of Circle using Java Program //Java program to Calculate Area of a Circle.importjava.util.Scanner;publicclassAreaCircle{publicstaticvoidmain(String[]args){doubleradius;Scanner sc=newScanner(System.in);// input radius of circleSystem.out.print("Enter the Radius of Circle : ");radius=sc....
To find the area of a circle, you take pi times the radius squared, or A = pi r^2. Using this formula, you can find the area of a circle if you know the radius -- or the diameter -- by plugging in your values and solving for A. Pi is approximated as 3.
The area of a circle with a radius of 3 cm is equal to the area of a square. What is the side length of the square? A. 3 cm B. 3π cm C. 3√π cm D. 9 cm 相关知识点: 试题来源: 解析 C。解析:圆的面积为π×3×3 = 9π平方厘米。设正方形边长为 a,则 a×a = 9π,...
The area of a circle with a radius of 3 cm is ___ square centimeters. A. 3π B. 6π C. 9π D. 12π 相关知识点: 试题来源: 解析 C。本题考查圆的面积公式。半径为 3 cm 的圆的面积是 A = πr² = π×3² = 9π 平方厘米。反馈 收藏 ...
Area of a Circle Area of a Circle Description: Complete the functioncircleAreaso that it will return the area of a circle with the givenradius. Round the returned number to two decimal places (except for Haskell). If the radius is not positive or not a number, returnfalse....
To find the area of a circle with a given radius, we can use the formula: Area of a Circle = πr² Where:-π (pi) is a constant approximately equal to 3.14,- r is the radius of the circle. 1. Identify the radius: The radius given is r=√5 cm. 2. Substitute the radius in...