Lines and Angles

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 are acute angles?

Back

Acute angles are angles that measure less than 90 degrees.

Front

How do you identify an acute angle?

Back

An acute angle can be identified as an angle that is smaller than a right angle (90 degrees).

Front

What is the measure of a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is the difference between acute and right angles?

Back

Acute angles measure less than 90 degrees, while right angles measure exactly 90 degrees.

Front

What is the sum of angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 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 is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.