, ar ( ) = 9 cm 2 , ar ( ) = 16 cm 2 . If BC = 2.1 cm, then the measure of EF is

Question

Philoid · Accepted Answer

Given Ar (ΔABC) = 9 cm², ar (ΔDEF) = 16 cm² and BC = 2.1 cm

We know that the ratio of areas of two similar triangles is equal to the ratio of squares of their corresponding sides.

∴ EF = 2.8 cm

, ar () = 9 cm2, ar () = 16 cm2. If BC = 2.1 cm, then the measure of EF is