Six identical triangles can be formed by drawing two straight lines through an octagon's center point.

经过八角形的中心画两条直线，能够得到六个一样的三角形。

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Six identical triangles can be formed by drawing two straight lines through an octagon's center point.

经过八角形的中心画两条直线，能够得到六个一样的三角形。

youdao