ΔABC ~ ΔPQR and ar (ΔABC) = 4ar (ΔPQR). If BC = 12 cm, find QR.
Given that 
We know that if two triangles are similar then the ratio of their areas is equal to the ratio of the squares of their corresponding sides.
3
ΔABC ~ ΔPQR and ar (ΔABC) = 4ar (ΔPQR). If BC = 12 cm, find QR.
Given that
We know that if two triangles are similar then the ratio of their areas is equal to the ratio of the squares of their corresponding sides.