Question

pqr is a triangle in which pq is 6cm,pr is 8cm then find qr​

Answer 1

we know s=(a+b+c+)/2

here a=6cm, b=8cm , c=12cm

therefore s=(6+8+12)/2

=26/2

=13

area of tringle=sqrt [ s (s-a) (s-b) (s-c)

=sqrt [ 13* (13-6) *(13-8)* (13-12)

=sqrt [ 13*7*5*1]

=sqrt [455]

=21.33(ans) [Here sqrt stands for square root]