Interior Angles of Triangles

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a 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 triangle.

Tags

CCSS.4.G.A.2

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90°.

Tags

CCSS.4.G.A.1

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90° but less than 180°.

Tags

CCSS.4.G.A.1

Front

How do you find the measure of a missing angle in a triangle?

Back

Subtract the sum of the known angles from 180°.

Tags

CCSS.8.G.A.5

Front

If two angles of a triangle are 45° and 65°, what is the measure of the third angle?

Back

The third angle is 70°.

Tags

CCSS.8.G.A.5

Front

What is the definition of a triangle?

Back

A triangle is a polygon with three edges and three vertices.

Tags

CCSS.2.G.A.1

Front

Can a triangle have two obtuse angles?

Back

No, a triangle cannot have two obtuse angles because the sum of the angles would exceed 180°.

Tags

CCSS.8.G.A.5

Front

What is the relationship between the angles in a triangle?

Back

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

Tags

CCSS.8.G.A.5

Front

What type of triangle has all sides of equal length?

Back

An equilateral triangle.

Tags

CCSS.4.G.A.2