Naming, Properties, & Vocab - Geometry

Front

What is the vertex of an angle?

Back

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

Front

What is a ray in geometry?

Back

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

Front

What is an acute angle?

Back

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

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 are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect; they are always equal.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

How do you name an angle using points?

Back

An angle can be named using three points: the vertex point in the middle and one point from each ray.

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 a right angle?

Back

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