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,...
If you want to find the area of a circle with a radius of 5, what formula should you use? A. A = πr² B. A = 2πr C. A = πd D. A = r² 相关知识点: 试题来源: 解析 A。解析:求圆的面积公式是 A = πr²,B 选项是圆的周长公式;C 选项是圆的周长公式中直径表示...
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× ...
Radius (r): or Diameter (d): or Area (A): Unit of Lenght: Calculate Circumference Result: The circumference of a circle with area 4π is 12.57(*) Formulas: r = 2 d = 4 C = 12.6 C = 2·π·r C = π·d C = √4·π·A π = 3.1415 A = area of...
Find the area of the sector of a circle with radius 4 cm and of angle 30∘. Also, find the area of the corresponding major sector. [Take π=3.14] View Solution Find the area of the sector of a circle with radius 4 cm and of angle 30o . Also, find the area of the correspondin...
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 ...
If the diameter of a circle is 5 cm, what is the circumference and area of the circle? The area of a circle is 12.56 square centimeters. What is the circle's circumference? What is the radius of a circle whose area is equal to sum of the areas of the circles with radii which ar...
百度试题 结果1 题目 What is the area of a circle whose radius is the diagonal of a square whose area is 4? A. 2π B. 2π C. 4π D. 8π E. 16π 相关知识点: 试题来源: 解析 D 反馈 收藏
Find the area of sector of a circle with radius 4 cm and angle60∘. View Solution The area of a sector of a circle of radius 5 cm, formed by an arc of length 3.5 cm is View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Cl...
3. What is the area of a circle with a radius of 3 units? A. 9π B. 6π C. 3π D. 12π Show Answer 4. Which of the following units is used for measuring the area of a circle? A. Square meters B. Meters C. Centimeters D. Kilometers Show Answer 5. If the...