Question

10. A ABC - A PQR. Area of A ABC is 72cm' and area of A PQR is 36cm.
If QR=12cm, find the length of the side of A ABC corresponding to QR.​

Answer 1

Answer:

7.2cm

2= square

Step-by-step explanation:

We know that the area of similar triangles ae proportional to the squares of their corresponding sides

∴

∴

A(△PQR)/A(△ABC)=(BC)2/(QR)2

Let BC =x cm Then

36/25=(x)2/(6)2

(x)2= 36*36/25

x= 6*6/5

x=36/5

x=7.5 cm