The formula for the area of a circle is ___. A. A=πr² B. A=2πr C. A=πd D. A=4πr² 相关知识点: 试题来源: 解析 A。本题考查圆的面积公式。选项 B 是圆的周长公式,选项 C 是圆的直径与圆周率的乘积,选项 D 不是圆的面积公式。只有选项 A 是圆的面积公式,A 表示面积,...
If the area of a circle is 36π square centimeters, what is the radius of the circle? A. 提回资提回资3 centimeters提回资提回资 B. 四他算原能条定风常更报难料量因她本角目行四他算原能条定风常更报难料量因她本角目行6 centimeters四他算原能条定风常更报难料量因她本角目行四他算原...
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× ...
View Solution The area of a circle is 38.5 sq. cm. its circumference (in cm )is (useπ=227): View Solution Free Ncert Solutions English Medium NCERT Solutions NCERT Solutions for Class 12 English Medium NCERT Solutions for Class 11 English Medium ...
Step 1: Write down the formula for the area of a circle.The area A of a circle is given by the formula:A=πr2where r is the radius of the circle. Step 2: Substitute the given area into the formula.We know the area of the circle is 154cm2. So we can set up the equation:π...
The area of a circle is 36π square meters. What's the radius of the circle? A. 6 meters B. 8 meters C. 10 meters D. 12 meters 相关知识点: 试题来源: 解析 A。本题考查圆的面积公式。圆的面积公式是πr²,已知面积是 36π,那么 r²=36,r=6,所以答案是 A。B 选项不是圆半径...
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...
The area of a circle is directly proportional to the square of its diameter. This implies that if the diameter of a circle is doubled, the radius will also get doubled but the area of the circle quadruples.Answer and Explanation:
The correct Answer is:8cm To solve the problem, we need to find the diameter of a circle given that the area of the circle is numerically equal to twice its circumference. 1. Write down the formulas for the area and circumference of a circle. - The area A of a circle is given by ...
To find the radius of a circle given its area, we can use the formula for the area of a circle: Area=πr2 Where:- π is a constant approximately equal to 227 or 3.14- r is the radius of the circle Given that the area of the circle is 616cm2, we can set up the equation: π...