Il logo di batmath

The area of a triangle

Given a triangle ABC, remember that the length of the vector product ABetAC is the area of the parallelogram ABDC.

a triangle is the half of a parallelogram

We then have: area of triangle = half the area of parallelogram = img. A simple calculation proves that this formula gives the same value as the following: img.

first published on march 15 2002 - last updated on september 01 2003