Question

Use heron formula to find the area of triangle ABC if side AB =3cm,BC =2cm,CA=4cm

Answer 1

Answer:

herons formula

A = √s(s-a)(s-b)(s-c)

s=(3+4+2)/2=    4.5

a=3

b=2

c=4

=√4.5(4.5-3)(4.5-2)(4.5-4)

=√4.5*1.5*2.5*0.5

=√8.4375

=2.9cm²