Question

Find the area of scalene triangle whose sides are 8 cm 10 cm and 12 cm

Answer 1

let 3 sides are a,b and c
a=8cm,b=10cm,c=12cm
s=(a+b+c)/2
s=(8+10+12)/2
s=15
s-a=15-8=7
s-b=15-10=5
s-c=15-12=3
area =root s(s-a)(s-b)(s-c)
=root 15*7*5*3
=15root 7