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。

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

youdao

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。

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

youdao