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....
There is an electric toy formed by a rectangles(8.28cm×5.14cm)and a circle of radius 3cm(with a baby face on it),they connect at Ponint A And E(as in the construction).If the circle rolls from Point A along the rectangular inner wall(no slip).Finally returns to the original positio...
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）；
待解决 悬赏分:1 - 离问题结束还有 the diagram shows a circle of radius 3 cm问题补充:匿名 2013-05-23 12:21:38 该图显示了一个半径3厘米的圆 匿名 2013-05-23 12:23:18 该图显示的一圈半径3cm 匿名 2013-05-23 12:24:58 图显示半径3 cm圈子 匿名 2013-05-23 12:26:38 图中...
(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...
Step by step video & image solution for A circle of radius 5 cm is drawn and another circle of 3 cm radius is cut out of this circle. What is the radius of a circle which has the same area as the area of the bigger circle excluding the cut one? (a) 2 cm (b) 3 cm (c) 4...
The length of the tangent from a pointAto a circle, of radius 3cm, is 4cm. The distance ofAfrom the centre of the circle is View Solution A chord of length 8 cm is drawn at a distance of 3 cm from the centre of a circle. Calculate the radius of the circle. ...
6. A circle has a radius of 6.1 cm.Work out the circumference of the circle.Give your answer correct to 3 significant figures.Diagram NOT D=6.1 ×2=12.2C=π ×d6.1 cm accurately drawn C=π ×12.238.3cm◆◆(3 marks) 相关知识点: ...
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:...