Question

in PQR, PR = 8cm, QR =4cm and PL = 5cm find (a) area of triangle PQR and (b) QM

Answer 1

trianlge plq and pmq are congurent triangles so pm=5 and mr=3
applying pythgorus in qmr we get qm =root7
hence area=
4root7

Answer 2

given,

in triangle PQR,

PR=8cm,QR=4cm and PL=5cm.

to find,

a) area of triangle PQR

b)PQ

proof,

Area of triangle PQR=1\2×QR×PL

= 2×5

= 10cm.sq

Area of triangle PQR=1/2×PR×QM

10 = 4×QM

QM. = 2.5CM

conclusion,

a)area of triangle PQR is 10 sq cm

b)QM=2.5cm