# Math Help - Area of a triangle

1. ## Area of a triangle

Calculate the area of a triangle with sides 4.2, 5.3, 7.6 cm

I used heron's formula $(\sqrt{s(s-a)+s(s-b)+s(s-c)})$ to get 8.55cm^2 as an answer. Is this correct?

2. ## area of triangle

Originally Posted by Mukilab
Calculate the area of a triangle with sides 4.2, 5.3, 7.6 cm

I used heron's formula $(\sqrt{s(s-a)+s(s-b)+s(s-c)})$ to get 8.55cm^2 as an answer. Is this correct?
Hi Mukilab,

This formula you quote is incorrect

bjh

3. aha, thanks for that