A Geometric Proof

See Also: Problem Solving with Heron's Formula

Heron's Formula


1. The incircle and its properties.

2. An excircle and its properties.

3. The area of the triangles is rs, where r is the inradius and s the semiperimeter.

4. The points of tangency of a circle inscribed in an angle are equidistant from the vertex.


Return to the EMAT 4400/6600 Page