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The figure above shows a ceramic tile in the shape of an equilateral triangle with sides of length 12 inches. Parts of the tile are gray, as represented by the shaded regions, and the rest of the tile is white. The equilateral triangle in the middle of the tile has sides of length 9 inches and consists of nine congruent equilateral triangles. What fraction of the area of the tile is gray?

A.$$\frac{3}{10}$$
B.$$\frac{3}{8}$$
C.$$\frac{2}{5}$$
D.$$\frac{1}{2}$$
E.$$\frac{3}{5}$$

B显示答案

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4.3.6 等边三角形

以上解析由考满分老师提供。

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