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Sahay Sir > Question Answers > NCERT Class 10 > Maths > Chapter 6 - Triangles > 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).

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).

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