Unit 1 Geometry Basics

Front

What is a complementary angle?

Back

A complementary angle is an angle that measures less than 90 degrees, and when added to another angle, the sum is 90 degrees.

Front

What is a supplementary angle?

Back

A supplementary angle is an angle that measures more than 90 degrees but less than 180 degrees, and when added to another angle, the sum is 180 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What are coplanar lines?

Back

Coplanar lines are lines that lie in the same plane.

Front

What is a vertex in geometry?

Back

The vertex is the endpoint that is shared by the two rays which form an angle.

Front

What is a line segment?

Back

A line segment is a part of a line that is bounded by two distinct endpoints.

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

What are intersecting lines?

Back

Intersecting lines are lines that cross each other at one point.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.