Classifying Triangles

Front

What is a triangle?

Back

A triangle is a three-sided polygon.

Tags

CCSS.2.G.A.1

Front

What are the three types of triangles based on angles?

Back

Acute, Right, and Obtuse.

Tags

CCSS.4.G.A.2

Front

What is an acute triangle?

Back

A triangle where all three angles are less than 90°.

Tags

CCSS.4.G.A.2

Front

What is a right triangle?

Back

A triangle that has one angle equal to 90°.

Tags

CCSS.4.G.A.2

Front

What is an obtuse triangle?

Back

A triangle that has one angle greater than 90°.

Tags

CCSS.4.G.A.2

Front

What is a scalene triangle?

Back

A triangle with no equal sides.

Tags

CCSS.4.G.A.2

Front

What is an isosceles triangle?

Back

A triangle with at least two equal sides.

Tags

CCSS.4.G.A.2

Front

What is an equilateral triangle?

Back

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

Tags

CCSS.4.G.A.2

Front

How many angles does a triangle have?

Back

Three angles.

Tags

CCSS.2.G.A.1

Front

What is the sum of the angles in a triangle?

Back

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

Tags

CCSS.8.G.A.5