how many triangles(三角形) are there in the picture?
how many triangles(三角形) are there in the picture?
there are____.见下图
╱|╲
╱╲|╱╲
——|——
╲╱|╲╱
╲|╱
there are____.见下图
╱|╲
╱╲|╱╲
——|——
╲╱|╲╱
╲|╱
英语人气:232 ℃时间:2019-09-22 03:05:37
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