Classifying Triangles

Front

What is a triangle?

Back

A triangle is a three-sided polygon.

Front

What are the types of angles in a triangle?

Back

Acute (less than 90°), Right (exactly 90°), Obtuse (more than 90°).

Front

What is an acute triangle?

Back

A triangle where all three angles are acute.

Front

What is a right triangle?

Back

A triangle that has one right angle.

Front

What is an obtuse triangle?

Back

A triangle that has one obtuse angle.

Front

What is an equilateral triangle?

Back

A triangle where all three sides are equal and all angles are 60°.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides that are equal in length.

Front

What is a scalene triangle?

Back

A triangle where all sides and angles are different.

Front

How do you classify a triangle by its angles?

Back

By identifying if it has acute, right, or obtuse angles.

Front

How do you classify a triangle by its sides?

Back

By identifying if it is equilateral, isosceles, or scalene.