ΔABC ~ Δ DEF such that ar(ΔABC) = 36 cm² and ar(ΔDEF) = 49 cm². Then, the ratio of their corresponding sides is

In an equilateral ΔABC, D is the midpoint of AB and E is the midpoint ar(ΔABC): ar(ΔADE) = ?

In ΔABC and ΔDEF, we have , then ar (ΔABC): ar (ΔDEF) = ?

Two isosceles triangles have their corresponding angles equal and their areas are in the ratio 25: 36. The ratio of their corresponding heights is

The line segments joining the midpoints of the sides of a triangle form four triangles, each of which is