Diameter or Circumference: Unit: Calculate Area Result: The area of a circle with diameter 94 is 6940 Formulae: r = 47 d = 94 C = 295 A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or
, What is the area of a circle whose diameter is as long as the diagonal of that square( ).A. 72π B. 36π C. 24π D. 18π 相关知识点: 试题来源: 解析 D The square's side is 6 and its diagonal is √62+62=√72, The area of the circle is πr2=π(√722)(√722)=...
Calculate the area of a circle using the radius, diameter, or circumference with the circle area calculator. Radius Diameter Circumference Area Reset Add this calculator to your site On this page: Calculator How to Calculate the Area of a Circle Circle Area Formulas Find Area ...
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× ...
So, let's see how to find the area of a circle. There are several ways to achieve it. Here, we can calculate the area of a circle using a diameter or using a radius. 💡 The diameter is the line that crosses the center of the figure and touches both of its margins. The radius...
The area, or space inside, a circle is calculated using the following formula: A = π⋅r2, where r represents the radius of the circle. The radius of a circle is a measure of a straight line segment extending from the center of the circle to its outer edge. Because a quarter circle...
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 diameter of a circle whose area is equal to the sum of the areas of the two circles of radii 24 cm and 7 cm is ( ).A.31 cmB. 25 cmC.62 cmD.50 cm 相关知识点: 试题来源: 解析 D.50 cm 1. **题目完整性判断**:题目提供两个已知半径的圆,以及合成后的圆直径选项,问题完整,...
A circle has a diameter of 12 cm. What is the area of the circle? A. 12π cm² B. 24π cm² C. 36π cm² D. 48π cm² 相关知识点: 试题来源: 解析 C。圆的面积公式为πr²,直径是 12cm,半径就是 6cm,面积为π×6²=36πcm²,A 选项结果错误,B 选项结果错误,D ...
Area of a circle formula The formula for the area of a circle is π x radius2, but the diameter of the circle is d = 2 x r2, so another way to write it is π x (diameter / 2)2. Visual on the figure below: π is, of course, the famous mathematical constant, equal to about...