11 In △PQR, PD⊥ QR, such that D lies on QR If PQ = a, PR = b, - Maths - Congruency of Triangles

Question

11 In △ PQR, PD ⊥ QR, such that D lies on QR If PQ = a,
PR = b, QD = c and DR = d, prove that (a + b) (a - b) = (c + d) (c
- d)

Aarushi Mishra · Accepted Answer

11. In △ PQR, PD ⊥ QR, such that D lies on QR. If PQ = a, PR = b, QD = c and DR = d, prove that (a + b) (a - b) = (c + d) (c - d).