Acute, Right, and Obtuse Triangles

Front

What is an acute triangle?

Back

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

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle equal to 90 degrees.

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle where one angle is greater than 90 degrees.

Front

How can you identify an acute triangle?

Back

You can identify an acute triangle by checking that all its angles are less than 90 degrees.

Front

How can you identify a right triangle?

Back

You can identify a right triangle by finding one angle that is exactly 90 degrees.

Front

How can you identify an obtuse triangle?

Back

You can identify an obtuse triangle by finding one angle that is greater than 90 degrees.

Front

What is the sum of the angles in any triangle?

Back

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

Front

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

Back

If one angle is 90 degrees, it is a right triangle.

Front

If all angles in a triangle are less than 90 degrees, what type of triangle is it?

Back

If all angles are less than 90 degrees, it is an acute triangle.

Front

If one angle in a triangle is greater than 90 degrees, what type of triangle is it?

Back

If one angle is greater than 90 degrees, it is an obtuse triangle.