Chapter Five:  
Relationships Within Triangles

Geometry   Notes

Chapter  5

Section  5.1
Section  5.2
Section  5.3
Section  5.4
Section  5.5

Geometry Contents

Take notes on the following topics.

Section 5-5  Inequalities in Triangles

Comparison Property of Inequality

If a = b + c and c > 0, then a > b

Corollary to the Triangle Exterior Angle Theorem

The measure of an exterior angle of a triangle is greater than the measure of each of its remote interior angles.

Theorem 5-10

If two sides of a triangle are not congruent, then the larger angle lies opposite the longer side.

Theorem 5-11

If two angles of a triangle are not congruent, then the longer side lies opposite the larger angle.