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°.

Tags

CCSS.4.G.A.2

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.

Tags

CCSS.4.G.A.2

Front

What is a scalene triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

What is a right-angled triangle?

Back

A triangle that has one angle measuring 90°.

Tags

CCSS.4.G.A.2

Front

What is the sum of the angles in any triangle?

Back

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

Tags

CCSS.8.G.A.5

Front

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

Back

It is a right-angled triangle.

Tags

CCSS.4.G.A.2

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.

Tags

CCSS.2.G.A.1

Front

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

Back

An acute triangle.

Tags

CCSS.4.G.A.2

Front

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

Back

An obtuse triangle.

Tags

CCSS.4.G.A.2

Front

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

Back

It is an equilateral triangle.

Tags

CCSS.4.G.A.2