Writing Proofs: Line and Angle Theorem

If $$m\angle A\ +\ m\angle B\ =90\degree$$ , then the angles are complementary 

If  $$\angle A\ and\ \angle B$$  are complementary then  $$m\angle A\ +\ m\angle B\ =90\degree$$  

If  $$\angle A\ and\ \angle B$$  are complementary, then the angles are linear pairs. 

If $$m\angle A\ +m\angle B=90\degree$$ , then the angles are supplementary.  

If $$m\angle A\ +\ m\angle B\ =180\degree$$ , then the angles are complementary 

If  $$\angle A\ and\ \angle B$$  are supplementary, then  $$m\angle A\ +\ m\angle B\ =180\degree$$  

If  $$\angle A\ and\ \angle B$$  are supplementary, then the angles are linear pairs. 

If $$m\angle A\ +m\angle B=180\degree$$ , then the angles are supplementary.  

Two adjacent angles

Supplementary angles

Two adjacent supplementary angles

Two adjacent complementary angles

$$\angle1\ and\ \angle2$$  are supplementary

$$\angle1\ and\ \angle2$$  are congruent

$$\angle1\ and\ \angle2\ are\ complementary$$