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Triangles A B C and D E F are similar...

Triangles `A B C` and `D E F` are similar. If area `( A B C)=16\ c m^2` , area `( D E F)=25\ c m^2` and `B C=2. 3 c m ,` find `E Fdot` (ii) If area `( A B C)=9\ c m^2` , area `( D E F)=64\ c m^2` and `D E=5. 1 c m ,` find `A Bdot` (iii) If `A C=19 c m` and `D F=8c m` , find the ratio of the area of two triangles.

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