Understanding Angle Pair Relationships

Front

Sum to 90 degrees

Back

Complementary Angles

Front

Sum to 180 degrees

Back

Supplementary Angles

Front

Share a common side

Back

Adjacent Angles

Front

Opposite angles, equal

Back

Vertical Angles

Front

Adjacent, form a line

Back

Linear Pair

Front

Equal, inside parallel lines

Back

Alternate Interior Angles

Front

Equal, outside parallel lines

Back

Alternate Exterior Angles

Front

Equal, same position

Back

Corresponding Angles

Front

Supplementary, inside parallel lines

Back

Consecutive Interior Angles

Front

Divides angle into two equal parts

Back

Angle Bisector