The radius of a circle is the straight-line distance from the very center of the circle to any point on the circle. The nature of the radius makes it a powerful building block for understanding many other measurements about a circle, for example its diameter, its circumference, its area and...
百度试题 结果1 题目A circle has radius 8cm.Calculate the area of the circle. 相关知识点: 试题来源: 解析 π×r²=π×8²=64π=201.06cm² 反馈 收藏
# Import the 'pi' constant from the 'math' module to calculate the area of a circle from math import pi # Prompt the user to input the radius of the circle r = float(input("Input the radius of the circle : ")) # Calculate the area of the circle using the formula: area = π *...
Calculate the circumference of a circle with a radius of 5 cm.相关知识点: 试题来源: 解析 10π厘米 或 31.4厘米(取π≈3.14) 圆的周长计算公式为 C = 2πr(其中r为半径)。已知半径r=5cm,代入公式可得:C = 2 ×π× 5 = 10π厘米若采用π的近似值3.14计算:C≈ 2 × 3.14 × 5 = 31.4厘米...
Students beginning geometry can expect to encounter problem sets that involve calculating the area and circumference of a circle. You can solve these problems as long as you know the circle's radius and can do some simple multiplication. If you learn the
- Letbe the diameter of the new circle. The area of this circle is: A=πd24 - Setting the areas equal gives: πd24=2704π Cancelπfrom both sides: d24=2704 6.Multiply both sides by 4: d2=2704×4=10816 7.Take the square root to findd: ...
Calculate the circumference of a circle with a radius of 8 cm.相关知识点: 试题来源: 解析 16π cm 计算圆的周长需要使用公式C=2πr,其中r是半径。题目中给出的半径为8 cm,因此将数值代入公式得到C=2×π×8=16π cm。题目条件完整,无需其他信息,直接应用公式即可得结果。
circle 类定义 包含一个私有成员变量 radius,用于存储圆的半径。 包含一个构造函数,用于初始化半径。 声明了一个友元函数 calculateArea。 友元函数实现 calculateArea 函数接受一个 circle 类型的常量引用作为参数。 使用公式 面积= π× radius² 计算面积,并返回结果。 main 函数 提示用户输入圆的半径,并读取输入...
百度试题 结果1 题目Calculate the area of a circle with a radius of 7 cm.相关知识点: 试题来源: 解析 Area = π(radius)^2 = π(7)^2 ≈ 反馈 收藏
// Rust program to calculate the area of circleusestd::io;fnmain() {letmutradius:f32=0.0;letmutarea:f32=0.0;letmutinput=String::new(); println!("Enter radius: "); io::stdin().read_line(&mutinput).expect("Not a valid string"); radius=input.trim().parse().expect("Not a valid...