Question

1.Find the area of a triangle whose sides are respectively 9 cm, 12 cm and 15 cm.
2.A triangle has sides 35 cm, 54 cm, 61 cm long. Find its area.​

Answer 1

Step-by-step explanation:

Area∆=√s(s-a)(s-b)(s-c)

s=a+b+c/2

9+12+15/2

=18

√18(18-9)(18-12)(18-15)=36cm