Types of Triangles

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length and all three angles measuring 60°.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length and the angles opposite those sides are equal.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths and all angles of different measures.

Front

What is a right-angled triangle?

Back

A triangle that has one angle measuring 90°.

Front

What is the sum of the angles in any triangle?

Back

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

Front

If one angle of a triangle is 90°, what type of triangle is it?

Back

It is a right-angled triangle.

Front

How can you identify an isosceles triangle?

Back

An isosceles triangle can be identified by having two sides of equal length and two equal angles.

Front

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

Back

An acute triangle.

Front

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

Back

An obtuse triangle.

Front

If a triangle has angles measuring 60°, 60°, and 60°, what type is it?

Back

It is an equilateral triangle.