triangles angles

Front

What is an obtuse angle?

Back

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

Front

What is an acute angle?

Back

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

Front

What is a right angle?

Back

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

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180°.

Front

What type of triangle has all angles less than 90°?

Back

An acute triangle has all angles less than 90°.

Front

What type of triangle has one angle that is obtuse?

Back

An obtuse triangle has one angle that is obtuse.

Front

What type of triangle has one right angle?

Back

A right triangle has one right angle.

Front

What is the sum of the angles in any triangle?

Back

The sum of the angles in any triangle is always 180°.

Front

If one angle in a triangle is 90°, what type of triangle is it?

Back

It is a right triangle.

Front

If a triangle has angles measuring 30°, 60°, and 90°, what type of triangle is it?

Back

It is a right triangle.