Math 20-2 Parallel Lines & Angles of a Triangle

Are these lines parallel?

• Yes

• No

Parallel lines

• meet or cross and form right angles

• stay the same distance apart, but also cross.

• meet or cross each other.

• stay the same distance apart and never touch

If two lines are parallel, then corresponding angles are

• consecutive

• equal

• vertical

• supplementary

Does this shape have parallel lines?

• Yes

• No

Do these shapes have parallel lines?

• Yes

• No

Which angles are corresponding?

Which angles are NOT corresponding?

Vertically opposite angles....

• add up to 180 degrees.

• are equal.

• are not equal.

• add up to 360 degrees.

Which are vertically opposite angles?

• corresponding angles.

• vertically opposite angles.

• alternate interior angles.

• alternate exterior angles.