Question

3. The sides of a triangle are in the ratio 3:5:6 and its perimeter is 70cm. Find the
area of the triangle.

​

Answer 1

Answer:42√15

Step-by-step explanation:peri.=S1+S2+S3=70

ratio =3:5:7

therefore, peri=3x + 5x + 7x =15x

70=15x

x=70/15

x=4.66

3x=3*4.66=13.98

approximately,14cm

5x=5*4.66

=23.3cm

7x=7*4.66

=32.62

s=70/2=35

a=14

b=23

c=32

ar.=√s(s-a)(s-b)(s-c)

=√35*21*12*3

=√7*5*3*7*2*2*3*3

=7*3*2√15

42√15