The area of a circle with a radius of 5 cm is ___. A. 25π cm² B. 10π cm² C. 5π cm² D. 75π cm² 相关知识点: 试题来源: 解析 A。本题考查圆的面积计算公式,圆的面积 = π×半径²。半径为 5cm,所以面积为 25π cm²。选项 B 计算错误,应为 25π cm...
题目The radius of a circle is 5 cm. What is the diameter of the circle? A. 2.5 cm B. 5 cm C. 10 cm D. 15 cm 相关知识点: 试题来源: 解析 C。圆的直径等于半径的两倍。已知半径是 5 厘米,所以直径是 10 厘米,选项 C 正确。选项 A 数值错误;选项 B 是半径的长度;选项 D 计算错误。
There is a circle. The radius is 5 cm. What is the circumference of the circle? A. 10π cm B. 15π cm C. 20π cm D. 25π cm 相关知识点: 试题来源: 解析 C。圆的周长公式为 2πr,半径是 5cm,周长就是 2π×5=10π cm,而四个选项中只有 C 的 20π cm 符合条件,A 选项结果...
百度试题 结果1 题目 In a circle whose radius is 5in., a chord is 3in. from the center. Find the length of the chord. 相关知识点: 试题来源: 解析 8in. 8in. 反馈 收藏
If a circle C, whose radius is 4, touches the circle x2+y2+4x−6y−3=0 at point (2,3) externally, then the length of the intercept cut by the circle C on the x−axis is equal to View Solution Q4 Equation of the circle whose radius is 5 and which touches e...
The circle has a ___ of 5 cm. A. diameter B. radius C. circumference D. area 相关知识点: 试题来源: 解析 B。本题考查圆的相关英语表述。选项 A“diameter”是直径;选项 C“circumference”是周长;选项 D“area”是面积。“radius”是半径的意思,这个圆的半径是 5 厘米。反馈...
1. Find the equation of the circle with(i) Centre at origin and radius 4.(ii) Centre at (-3, -2) and radius 6.(iii) Centre at (2, -3) and radius 5.(iv) Centre at (-3, -3) passing through point(-3,-6) 相关知识点: 试题来源: 解析 (i)x^2+y^2=16(ii)x^2+y^...
Find the equation of the circle (i) whose centre is (4,5), radius is 7, (ii) whose centre is (0, -4 ) and which touches the x-axis, (iii) which passes through the origin and cuts off intercepts of length ‘a ’, each from positive direction of the axes. Video SolutionText...
(c)The radius of the semi-circle centre O is 5 cm. A square is fitted into the semi-circle as shown in the diagram. Calculate the area of the square.(Hint: Let the length of the square equal .x. )A BD EO FC 相关知识点: 试题来源: 解析 x^2+(x^2)/4=25 反馈 收藏 ...
A circle has a radius of 5 cm. What's the circumference of the circle? A. 10π cm B. 15π cm C. 20π cm D. 25π cm 相关知识点: 试题来源: 解析 C。本题考查圆的周长计算。圆的周长等于 2πr,半径为 5cm,所以周长是 2×π×5 = 10πcm。A 选项少乘了 2;B 选项计算错误;D ...