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
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 ...
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× ...
area of the circle by the known diameter. When the solution is given, the radius R is calculated and the area of the circle is calculated. Sixth, is seeking a number of the square of the teacher. Master the commonly used square calculation, to improve the speed of calculating the...
Find the area of a circle whose radius is 15 mm. Solution A = πr2 square units By substitution, A = 3.14 x 152 = (3.14 x 15 x 15) mm2 = 706.5 mm2 So, the area of the circle is 706.5 mm2 Example 2 Calculate the area of the circle shown below.SolutionA...
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...
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
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...
Find the area of this circle. The radius is 2.6 cm. Find the area of a circle whose radius is 2.78 cm? What is the circumference and the area of a circle that has a diameter of 35 cm? If the diameter of a circle is 5 cm, what is the circumference and area of the circle?
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 ...