Question

A triangle PQR is right angled at R, with PQ=80cm and R=60cm. find QR?
pythagorus theorem

Answer 1

Solution given:

A triangle PQR is right angled at R, with hypotenuse{h}PQ=80cm

and

base[b]PR=60cm.

perpendicular [P]= QR

by using Pythagoras law

h²=p²+b²

80²=QR²+60²

QR²=80²-60²

QR=
`√(2800)`

QR=20
`√(7)`=52.9=53cm

QR=53cm.