Unit 2 Vocabulary Practice

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are equal.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a linear angle?

Back

An angle that forms a straight line, measuring exactly 180 degrees.

Front

What is an adjacent angle?

Back

Two angles that share a common side and a common vertex.

Front

What is a line in geometry?

Back

A straight one-dimensional figure that has no thickness and extends infinitely in both directions.

Front

What is a ray in geometry?

Back

A part of a line that starts at a point and extends infinitely in one direction.

Front

What is a segment in geometry?

Back

A part of a line that is bounded by two distinct end points.