上图为六角形。每边为10cm。每个弧形是由每个六角形的角为中心点画成的,半径跟六角形的边是一样的。
尽量利用以下的资料,请算出画出来的部分的面积。
[pi = 3.14, sin 60 = 0.87, cos 60 = 0.50, tan 60 = 1.73]
原文:The figure shows a regular hexagon of side 10 cm. Each of the arcs is drawn using each vertex of the hexagon as the centre, and having a radius equal to the length of each side of the hexagon.
Using the following information as much as necessary, find the area of shaded region.
[pi = 3.14, sin 60 = 0.87, cos 60 = 0.50, tan 60 = 1.73]
切记:不能用计算机! |