Points, Lines, Line Segments, Rays, and Angles

Front

What is the definition of an obtuse angle?

Back

An angle that is open more than a right angle but less than a straight angle. This angle measures between 90 and 180 degrees.

Front

What is the definition of an acute angle?

Back

An angle that is open less than a right angle and has a measure less than 90 degrees.

Front

What is a point?

Back

An exact location.

Front

What is the measurement of a right angle?

Back

90 degrees.

Front

What is the term for a part of a line with two endpoints?

Back

Line segment.

Front

What is a line?

Back

A straight path that extends infinitely in both directions.

Front

What is a ray?

Back

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

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

What do we call angles that are equal in measure?

Back

Congruent angles.

Front

What is the sum of the angles in a triangle?

Back

180 degrees.