有多少三角形？有四个三角形。
How many triangles are there? There are four triangles.
youdao
下列哪三角形与三角形r的面积相等？
Which of the following has the same area as triangle r.
终结三角形比引导三角形更常见。
Ending Diagonals are much more common than Leading Diagonals.
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