Classifying Triangles

Front

What is a triangle?

Back

A triangle is a polygon with three edges and three vertices.

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 (less than 90°).

Front

What is a right triangle?

Back

A triangle that has one angle exactly 90°.

Front

What is an obtuse triangle?

Back

A triangle that has one angle greater than 90°.

Front

What is an isosceles triangle?

Back

A triangle with at least two equal sides.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

How do you classify a triangle with two equal sides and all angles less than 90°?

Back

It is classified as an Acute Isosceles triangle.

Front

How do you classify a triangle with one right angle and two equal sides?

Back

It is classified as a Right Isosceles triangle.

Front

What is the sum of the angles in any triangle?

Back

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