In a triangle PQR, N is a point on PR such that QN is perpendicular to PR. If PN.NR = QN^2, then

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#InatrianglePQRNisapointonPRsuchthatQNisperpendiculartoPRIfPNintoNRisequaltoQN2thenprove




In a triangle PQR, N is a point on PR such that QN is perpendicular to PR. If PN.NR = QN^2, then prove that angle PQR = 90 degree.