Question 11In a ΔPQR, N is a point on PR such that QN⊥PR. If PN.NR=QN2, then prove that ∠PQR=90∘.

Question 11In a ΔPQR, N is a point on PR such that QN⊥PR. If PN.NR=

1.	Question 11In a ΔPQR, N is a point on PR such that QN⊥PR. If PN.NR=QN2, then prove that ∠PQR=90∘.
Answer» Question 11 In a $Δ$ PQR, N is a point on PR such that $Q N ⊥ P R$ . If $P N . N R = Q N^{2}$ , then prove that $∠ P Q R = 90^{\circ}$ .