1.If P(3,2,6)P(3, 2, 6)P(3,2,6), Q(1,4,5)Q(1, 4, 5)Q(1,4,5) and R(3,5,3)R(3, 5, 3)R(3,5,3) are the vertices of △PQR\triangle PQR△PQR, then m∠PQRm\angle PQRm∠PQR isa.90∘90^\circ90∘b.50∘50^\circ50∘c.70∘70^\circ70∘d.30∘30^\circ30∘Login to continueOnly logged in users canattempt or see the solution.
