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Mathematics 19 Online
OpenStudy (anonymous):

The ratio of corresponding sides of similar triangles is 4 : 9 . If the longest side of the smaller triangle is 36mm, what is the longest side of the larger triangle?

OpenStudy (saifoo.khan):

4 : 9 36 : x Cross multiply.

OpenStudy (saifoo.khan):

4x = 324 x = 81

OpenStudy (kinggeorge):

\[36 \times {9 \over 4} = 81mm\]

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