A circle has a radius of 3 cm. What is the circumference of the circle? A. 6π cm B. 9π cm C. 18π cm D. 3π cm 相关知识点: 试题来源: 解析 A。圆的周长 = 2×π×半径,即 2×π×3 = 6π cm 。选项 B、C、D 计算错误。
The problem asks for the combined area of two circles. The first circle has a radius of 3, so plug this value into the area formula for a circle:A= π r^2= π (3^2)=9 πThe second circle has a diameter of 3, so it has a radius of 32. Plug this value into the area form...
解析 C。解析:圆的面积为π×3×3 = 9π平方厘米。设正方形边长为 a,则 a×a = 9π,所以 a = 3√π cm。A 选项边长为 3cm,面积为 9 平方厘米不等于圆面积;B 选项 3π cm 不是正方形边长;D 选项 9cm 边长的正方形面积为 81 平方厘米也不等于圆面积。
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 ...
百度试题 结果1 题目Circle A has a radius of ___. A. 3 cm B. 5 cm C. 8 cm D. 12 cm 相关知识点: 试题来源: 解析 B。解析:文章中明确提到 Circle A 的半径是 5cm。反馈 收藏
Here, the radius of the circle,r=3 units Since, the circle touches both the axes and completely lies in the third quadrant, its centre is at(-3,-3).Now, the equation of the circle is(x-h)²+(y-k)²=r²or,{x-(-3)}²+{y-(-3)}²=3²or,(x+3)²+(y+3)²...
【GRE真题答案解析】GRE考满分为考生准备GRE 数学QR真题答案解析,Circle Ohas a radius of 3, and is intersected by a line at points R and S.What is the maximum possible distance between R and S?
结果1 题目A circle has a radius of 4. What is the circumference of the circle? A. 8π B. 16π C. 4π D. 2π 相关知识点: 试题来源: 解析 B。解析:圆的周长等于 2πr,半径是 4,所以周长是 2π乘以 4 等于 8π。反馈 收藏
Write down the exact value of the following and state whether the answer is rational or not:3 cm a) the circumference of the circle b) the diameter of the circle c) the are a of the square d) the are a of the circle e) the shaded area. ...
我会想家。 Graciousness, I do not look like you in order to vainly hope for equally like this persisted, I cannot leave the family.I can miss homeland. [translate] athe diagram shows a circle of radius 3 cm 图显示半径3 cm圈子 [translate] ...