Angles

Front

What is an acute angle?

Back

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

Front

What is a right angle?

Back

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

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 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 the difference between complementary and supplementary angles?

Back

Complementary angles are two angles that add up to 90 degrees, while supplementary angles are two angles that add up to 180 degrees.

Front

How can you identify an acute triangle?

Back

An acute triangle is a triangle where all three interior angles are acute (less than 90 degrees).

Front

How can you identify an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle that is obtuse (greater than 90 degrees).

Front

What is a reflex angle?

Back

A reflex angle is an angle that measures more than 180 degrees but less than 360 degrees.

Front

What is the relationship between angles formed by intersecting lines?

Back

When two lines intersect, they form pairs of vertical angles that are equal and pairs of adjacent angles that are supplementary.