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× ...
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 ...
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...
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...
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...
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
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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 radius of a circle is any of the line segments from its center to its perimeter. The radius is half the diameter or r = d2. Diameter The diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. The diam...