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] ...
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。
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。
One central circle, of radius 3 cm and centre O, is completely surrounded by other circles which touch it and touch each other, as shown in the diagram. These outer circles are identical to each other.Extend the result to n small circles and test your result when n=20. 相关知识点: ...
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 ...
There is a circle. The radius is 3 cm. What is the circumference of the circle? A. 6π cm B. 9π cm C. 3π cm D. 18π cm 相关知识点: 试题来源: 解析 A。本题考查圆的周长计算。圆的周长等于 2πr,半径为 3 厘米,周长为 2×π×3 = 6π 厘米。选项 B 9π 厘米错误,选项 C...
2×3.14）=1（圈），娃娃脸同A；B到C转了（5.14-1-1）÷（2×3.14）=0.5（圈），娃娃与A上下相反；C到D转了（8.28-1-1）÷（2×3.14）=1（圈），娃娃脸同C；D到A转了（5.14-1-1）÷（2×3.14）=0.5（圈），娃娃脸回到A位置；小圆盘共自转了1+0.5+1+0.5=3（...
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
Thereisanelectrictoyformedbyarectangles(8.28cm×5.14cm)andacircleofradius3cm(withababyfaceonit),theyconnectatPonintA AndE(asintheconstruction).IfthecirclerollsfromPointAalongtherectangularinnerwall(noslip).Finallyreturnstotheoriginalposition.Ⅰ.PleasesketchthecirclewithababyfaceatPositionB,C,Drespectively.Ⅱ...