Unit 2 Angle, Lines, & Proofs Vocab Review

Front

What are perpendicular lines?

Back

Lines that intersect at a right angle.

Front

What are adjacent angles?

Back

Angles that share a vertex and a side.

Front

What are supplementary angles?

Back

Angles that have a sum of 180°.

Front

What are consecutive interior angles?

Back

The angles that lie on the same side of the transversal inside the lines.

Front

What are vertical angles?

Back

The opposite and congruent angles formed by two intersecting lines.

Front

What are complementary angles?

Back

Angles that have a sum of 90°.

Front

What is a transversal?

Back

A line that intersects two or more lines in a plane.

Front

What are alternate interior angles?

Back

The pairs of angles on opposite sides of the transversal inside two lines.

Front

What are corresponding angles?

Back

The angles that are in the same position at each intersection where a transversal crosses two lines.

Front

What is the angle sum property of triangles?

Back

The sum of the interior angles of a triangle is always 180°.