Question

IF Δ ABC ≈ Δ DEF, ar(ABC)/ar(DEF) = 9/25, BC = 21cm, then EF is equal to ??

Answer 1

Hope It helps

Foll_w if it did

Answer 2

Answer:

35 cm

Step-by-step explanation:

Theorem :Two triangle are similar,than the ratio of the area of both triangles is proportional of the square of the ratio of the corresponding sides .This proves that the ratio of areas of two similer triangle is proportional of the squares of the corresponding sides of both the triangle