Triangle Classification

Front

What is a triangle classified by its angles?

Back

Triangles can be classified as acute (all angles less than 90°), right (one angle exactly 90°), obtuse (one angle greater than 90°), or equiangular (all angles equal).

Front

What type of triangle has one right angle?

Back

A right triangle.

Front

What is an isosceles triangle?

Back

A triangle with at least two equal sides and two equal angles.

Front

What is a scalene triangle?

Back

A triangle with no equal sides and no equal angles.

Front

What is an equilateral triangle?

Back

A triangle with all three sides equal and all angles equal to 60°.

Front

How do you classify a triangle with one angle greater than 90°?

Back

It is classified as an obtuse triangle.

Front

What is the sum of the angles in any triangle?

Back

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

Front

What type of triangle has all angles less than 90°?

Back

An acute triangle.

Front

If a triangle has two equal sides, what type of triangle is it?

Back

It is an isosceles triangle.

Front

What is a right isosceles triangle?

Back

A triangle that has one right angle and two equal sides.