Protractor Basic geometry

Front

What is an angle?

Back

Two rays with the same end point, forming a vertex.

Front

What angle is exactly 90 degrees?

Back

Right angle.

Front

A line that passes through 2 or more lines is called a ______________.

Back

Transversal.

Front

What do we call a collection of points that extends indefinitely in two directions?

Back

A line.

Front

What is the best term to describe this image? (Assuming image shows parallel lines)

Back

Parallel lines.

Front

What is a ray?

Back

A part of a line that has one endpoint and extends indefinitely in one direction.

Front

What are perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees).

Front

What is an acute angle?

Back

An angle that is less than 90 degrees.

Front

What is an obtuse angle?

Back

An angle that is greater than 90 degrees but less than 180 degrees.

Front

What is a straight angle?

Back

An angle that is exactly 180 degrees.