Geometry Vocab

Front

What is the definition of a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

What is the coordinate rule for a reflection across the x-axis?

Back

(x, y) --> (x, -y)

Front

What are adjacent angles?

Back

Angles that share a common side and a common vertex.

Front

What is the coordinate rule for a rotation of 270 degrees counterclockwise?

Back

(x, y) --> (y, -x)

Front

What is the definition of vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What is the definition of complementary angles?

Back

Two angles whose measures add up to 90 degrees.

Front

What is the definition of supplementary angles?

Back

Two angles whose measures add up to 180 degrees.

Front

What is the coordinate rule for a reflection across the y-axis?

Back

(x, y) --> (-x, y)

Front

What is the definition of a ray?

Back

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

Front

What is the definition of a line segment?

Back

A part of a line that has two endpoints.