Question

Pls find the ar (triangle DEF) ..

Answer 1

area of triangle ABC = 117cm^2
BC = 3EF
ar (triangle ABC) / ar (triangle DEF) = (BC/EF)^2
117/ar (triangle DEF) = (3EF/EF)^2
117 / ar (triangle DEF) = (3/1)^2
117/ar (triangle DEF) = 9/1
117/9 = ar (triangle DEF) = 13cm^2