_ Section Five
Indirect proof- A proof that begins by assuming that the conclusion is false.
5-5-1- If two sides of a triangle are not congruent, then the larger angle is opposite the longer side.
5-5-2- If two angles of a triangle are not congruent, then the longer side is opposite the longer angle.
Triangle Inequality Theorem- The sum of any two side lengths of a triangle is greater than the third side length.
Indirect proof- A proof that begins by assuming that the conclusion is false.
5-5-1- If two sides of a triangle are not congruent, then the larger angle is opposite the longer side.
5-5-2- If two angles of a triangle are not congruent, then the longer side is opposite the longer angle.
Triangle Inequality Theorem- The sum of any two side lengths of a triangle is greater than the third side length.