1.1 Geometry Vocab (THS)

Front

What is a ray?

Back

A ray is a part of a line that has a fixed starting point and extends infinitely in one direction.

Front

What is a line?

Back

A line is a straight one-dimensional figure that has no endpoints and extends infinitely in both directions.

Front

What is a line segment?

Back

A line segment is a part of a line that has two endpoints.

Front

What is an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.

Front

What does it mean for lines to be coplanar?

Back

Lines are coplanar if they lie in the same plane.

Front

What is the difference between a line and a line segment?

Back

A line extends infinitely in both directions, while a line segment has two endpoints.

Front

What is the vertex of an angle?

Back

The vertex of an angle is the point where the two rays meet.

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is a right angle?

Back

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