Types of Triangles

Front

What is a right triangle?

Back

A right triangle is a triangle that has one right angle (90 degrees).

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 an obtuse triangle?

Back

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

Front

How many right angles does a right triangle have?

Back

A right triangle has one right angle.

Front

What type of triangle has all sides equal?

Back

An equilateral triangle has all sides equal and all angles equal to 60 degrees.

Front

What type of triangle has one angle greater than 90 degrees?

Back

An obtuse triangle has one angle greater than 90 degrees.

Front

What type of triangle has three acute angles?

Back

An acute triangle has three acute angles.

Front

Can a triangle have more than one obtuse angle?

Back

No, a triangle cannot have more than one obtuse angle.

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

What type of triangle is this: one angle is 90 degrees, and the other two angles are acute?

Back

This is a right triangle.