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PSAT 8/9 P2 · 第 14 题

PSAT 8/9 P2 · 原库模块 3 · Q14 原库参考解析

A total of 2 squares each have side length r. A total of 6 equilateral triangles each have side length t. None of these squares and triangles shares a side. The sum of the perimeters of all these squares and triangles is 210. Which equation represents this situation?
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