题目A circle has a diameter of 10 cm. What is its circumference? A. 15.7 cm B. 20 cm C. 31.4 cm D. 62.8 cm 相关知识点: 试题来源: 解析 C。圆的周长等于π乘以直径,π取 3.14,直径是 10 厘米,那么周长为 3.14×10 = 31.4 厘米。
A circular garden has an area of 49π square meters. What is its circumference? A. 7π meters B. 14π meters C. 21π meters D. 28π meters 相关知识点: 试题来源: 解析 B。解析:圆的面积公式为πr²,已知面积为 49π,可得πr² = 49π,解得 r = 7m,圆的周长公式为 2πr,所以...
The area of a circle of radius {eq}\displaystyle r {/eq} is {eq}\displaystyle \pi r^2 {/eq} and the circumference, the length around the circle, is {eq}\displaystyle 2\pi r. {/eq}Answer and Explanation: If the area of a circle is {eq}\displaystyle 420\ \rm cm...
How to find the circumference of any a circle given its diameter. The circumference of a circle with diameter of 32 is equal to 100.5. See the solution steps here.
How to find the circumference of any a circle given its radius. The circumference of a circle with radius of 4.11 is equal to 25.82. See the solution steps here.
What is the circumference of the circle above ?() (1)The length of arc XYZ is 18. (2)r=s A.条件(1)充分,但条件(2)不充分. B.条件(2)充分,但条件(1)不充分. C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分. D.条件(1)充分,条件(2)也充分. E.条件(1)和条件(2)单...
A. The distance across the circle. B. The distance from the center to any point on the circle. C. The distance around the circle. D. The number of points on the circle. 相关知识点: 试题来源: 解析 C。原因:文中提到“The circumference of a circle is the distance around it.”。 反馈...
C.It is unlikely that many of these unmarried Prenlandic men will marry women more than a few years older than themselves D.Prenland has a high rate of divorce E.Most of the unmarried Prenlandic men are unwilling to marry women who are not Prenlandic ...
A circle does not have any volume because it is a two-dimensional geometry so it does not contain height. The locus of all points that makes a rough path is called the circumference of the circle. If a circle has a radius of {eq}r {/eq} then the measure of its circumference is ...
2*pi(如果你取3.14的话）*12=circumference of the whole circle(得到整个圆的周长）=75.36ft 然后圆心角(60/360)*75.36=12.56ft,就这么算