Homologous sides of two similar polygons have the ratio of 5 to 9 , the sum of the areas is 212 sq. ft. Find the area of each figure.
Homologous sides of two similar polygons have the ratio of 5 to 9 , the sum of the areas is 212 sq. ft. Find the area of each figure.
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以 n 角形之顶点为顶点,而不是 n 角形之边为边之三角形共有若干?
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