4. M and N are the mid-points of the sides QR and PQ respectively of a A PQR, right-angledat Q. Prove that :(i) PM? + RN2 = 5 MN2

4. M and N are the mid-points of the sides QR and PQ respectively of

1.	4. M and N are the mid-points of the sides QR and PQ respectively of a A PQR, right-angledat Q. Prove that :(i) PM? + RN2 = 5 MN2
Answer» M Andn Are the Mid-points of the Sides Qr and Pq Respectively of A PQR, Right-angled at Q. PROVE That: Pm2 + Rn2 = 5 Mn2 4 Pm2 = 4 PQ2 + Qr2 4 Rn2 = Pq2 + 4 Qr2 4 (Pm2 + Rn2) = 5 Pr2 - Mathematics.

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4. M and N are the mid-points of the sides QR and PQ respectively of a A PQR, right-angledat Q. Prove that :(i) PM? + RN2 = 5 MN2​

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4. M and N are the mid-points of the sides QR and PQ respectively of a A PQR, right-angledat Q. Prove that :(i) PM? + RN2 = 5 MN2