Circumference length formula in terms of area C = √4·π·A Questions this calculator can answer: How to find the perimeter of a circle with a radius of 3.464 m? A circle has a diameter of 6.928 m. What is its circumference?
Use the this circle area calculator below to find the area of a circle given its radius, or other parameters. To calculate the area, you just need to enter a positive numeric value in one of the 3 fields of the calculator. You can also see at the bottom of the calculator, the step-...
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 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...
What is the area of a circle with a circumference of 8pi inches? If the diameter of a circle is 1.3 times 10^{-12} meters, then what is its radius? If the diameter of a circle is 1.3 x 10^{-12} meters, then what is its radius?
where R is the radius of the circle The area of the circle area (A)=πR2 and, circumference of the circle (C)=2πR Answer and Explanation: Given that the radius of a circle is 12 cm. R=12 cm The diameter of a circle has the double length as comp...
D. It increases by a factor of eight Show Answer Advertisement - This is a modal window. No compatible source was found for this media. 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...
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...
1【题目】5Given that the area of a circle with radius 10 cm is equal to the area of asector with centralangle 40°, then the radius of the sector iscm. 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 radiu...
A is the area of a circle with radius r units. Write the formula of area, making r as the subject.