Question

In ΔPQR, right-angled at Q (see Fig. 8.20), PQ = 3 cm and PR = 6 cm. Determine ∠QPR and ∠PRQ.

Answer 1

PR^2=PQ^2 × QR^2
36. = 9. × QR^2
QR^2= 36/9
= 4cm

Answer 2

So Angle QPR = 60 degree
Angle PRQ = 30 degree