Question

In APQR, right-angled at
Q, PQ = 12 m and PR = 13
m. What is the length of
QR?
SU​

Answer 1

qr= root of {pr}^{2} - {pq}^{2} }

qr=root of (13^2-12^2)

qr=root of (169-144)

qr=root of(25)

qr=5