find the area of the triangle by using either herons formula or the area = 1/2 a b sin C formula

Question

i have to look for and take a picture of a triangle and turn the angle into an oblique triangle. I have to find the area of the triangle by using either herons formula or the area = 1/2 a b sin C formula. Can you give me an example on how to do the math and where i can look for to take a picture of the triangle.

Answer 1

Heron's formula is sqrt[s(s-a)(s-b)(s-c), where a,b, and c are the sides and s = (1/20(a+b+c).