Angle relationships

Right Angle

90 degree angle

Transversal

A line that intercects through two or more parallel lines creating multiple angles

Parallel Lines

Lines that have the same slope and never cross

The angles add to 180°

What do you know about the degrees of supplementary angles?

They are equal

What do you know about the degrees of two vertical angles?

Supplementary Angles

2 or more angles that add up to 180

Complementary Angles

2 or more angles that add up to 90

Adjacent Angles

Angles that share a common side and a common vertex (corner point).

Consecutive Interior Angles

Angles the lie on the inside of the parallel lines and on the same side of the transversal

65°

If an angle is 115, what is it's supplementary angle?

55°

If an angle is 35°, what is the value of its complementary angle?

Straight Angles

Angle that equals 180 degrees

Obtuse Angle

Angle that is greater than 90 and less than 180

Acute

Angle that is greater than zero and less than 90

Alternate Interior Angles

Angles on the inside of the parallel lines but opposite sides of the transversal

Alternate Exterior Angles

Angles on the outside of the parallel lines but opposite sides of the transversal

Corresponding Angles

Angles that are in the same position on two parallel lines in relation to the transversal

Congruent Angles

Angles that have the same measure

145°

Solve for x

Vertical Angles

The angles opposite of each other when two lines intersect