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。
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] ...
Fifteen circles fit into a rectangle. The radius of each circle is 3cm. What is the are a of the rectangle? A.540cm2 B.270cm2 C.135cm2 D.288cm2 E.144cm2 答案 A(3×6)×(3×10)=18×30=540.相关推荐 1Fifteen circles fit into a rectangle. The radius of each circle is 3cm....
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(圈);
Radius of a circle is the distance between center of circle and the point on circle. Radius is half of diameter, the longest chord of circle. Circumference is the distance around the circle. Radius formula and equation at BYJU’S.
(201922)Each of the circles in this diagram has a radius of 3cm and an are a of approximately 28.26cm^2. The circles fit together, touching the edges of the square. What is the approximate are a of the shaded region?( )∴1/2∴ A: between 3cm^2 and 5cm^2 B: between 5cm^2 and...
Thereisanelectrictoyformedbyarectangles(8.28cm×5.14cm)andacircleofradius3cm(withababyfaceonit),theyconnectatPonintA AndE(asintheconstruction).IfthecirclerollsfromPointAalongtherectangularinnerwall(noslip).Finallyreturnstotheoriginalposition.Ⅰ.PleasesketchthecirclewithababyfaceatPositionB,C,Drespectively.Ⅱ...
7. (a) A circle has a radius of 8mm. Workout the circumference of the circle. Roundyour answer to the nearest millimetre.mm(1 mark)(b)A different circle has a diameter of 3cm.Work out the circumference of this circle.Round your answer to the nearest 0.1cm.cm(1 mark) 相关知识点:...
Step by step video & image solution for In figure,a right triangle ABC,circumscribes a circle of radius r.If AB and BC are of length 8 cm and 6 cm respectively, find the value of r. by Maths experts to help you in doubts & scoring excellent marks in Class 10 exams.Updated on:21...
D2 In a circle with radius 12 cm, what is the length of the chord that is the perpendicular bisector of the radius? 12 3cm 相关知识点: 试题来源: 解析 http://gallery.fbcontent.cn/latex?decode=false&latex=%24%2412%5Csqrt%7B3%7D%20%7Bcm%7D%5E%7B2%7D%20%24%24%25&fontSize...