Question

How to find the exact area of this triangle.

Answer 1

h^2=12^2-(20-12)^2

h^2=144-64

h^2=80

h=√80

A=bh/2

A=20√(80)/2

A=10√80

A=40√5 cm^2

A≈89.44 cm^2 (to the nearest one-hundredth of a cm^2)