Classifying Triangles

Front

What is an acute triangle?

Back

A triangle where all three angles are less than 90°.

Front

How many angles does an acute triangle have?

Back

3 acute angles.

Front

What is a right triangle?

Back

A triangle that has one angle equal to 90°.

Front

What is an obtuse triangle?

Back

A triangle that has one angle greater than 90°.

Front

What is a scalene triangle?

Back

A triangle with no equal sides.

Front

What is an isosceles triangle?

Back

A triangle with at least two equal sides.

Front

What is an equilateral triangle?

Back

A triangle with all three sides and angles equal.

Front

If a triangle has two equal sides and all angles less than 90°, what type is it?

Back

Acute Isosceles.

Front

If a triangle has one angle greater than 90° and no equal sides, what type is it?

Back

Obtuse Scalene.

Front

What is the sum of the angles in any triangle?

Back

180°.