Classifying Triangles by Angles

Front

What is a triangle?

Back

A triangle is a shape with three sides and three angles.

Tags

CCSS.2.G.A.1

Front

What are the three types of triangles based on angles?

Back

Acute Triangle, Right Triangle, Obtuse Triangle.

Tags

CCSS.4.G.A.2

Front

What is an acute triangle?

Back

An acute triangle has all three angles less than 90 degrees.

Tags

CCSS.4.G.A.2

Front

What is a right triangle?

Back

A right triangle has one angle that is exactly 90 degrees.

Tags

CCSS.4.G.A.2

Front

What is an obtuse triangle?

Back

An obtuse triangle has one angle that is greater than 90 degrees.

Tags

CCSS.4.G.A.2

Front

How can you identify a right triangle?

Back

A right triangle can be identified by its 90-degree angle.

Tags

CCSS.2.G.A.1

Front

If a triangle has one angle greater than 90 degrees, what type is it?

Back

It is an obtuse triangle.

Tags

CCSS.4.G.A.2

Front

If all angles in a triangle are less than 90 degrees, what type is it?

Back

It is an acute triangle.

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 degrees.

Tags

CCSS.8.G.A.5

Front

Can a triangle be both acute and obtuse?

Back

No, a triangle cannot be both acute and obtuse at the same time.

Tags

CCSS.4.G.A.2