Question

PQR is a right-angled triangle with the right angle at Q and k being the length of the perpendicular from Q on PR. If l, m and n are the lengths of sides PQ, QR, and PR respectively, then which of the following holds true?


a.1k2=1l2−1m2 b.1k2=1l2+1m2 c.1k2=1m2−1l2 d.1m2=1l2−2k2​

Answer 1

Answer:

perpendicular from Q on PR. If l, m and n are the lengths of sides PQ, QR, and PR respectively, then which of the following holds true