Proving lines are parallel

4.3 proving triangles are congruent

4.3 4.4 SAS and ASA Proofs

4.1 triangles and angles

Proving lines are perpendicular

5.1 perpendiculars and bisectors i

5.1 perpendiculars and bisectors ii

5.5 writing linear equations

5.2 bisectors of a triangle

3.2 theorems about perpendicular lines

4.4 aas proofs

4.2 congruence and triangles

4.4 rates of change

4.7 triangles and coordinate proof