Triangle Angle Sum and Exterior Angles

Front

What is the Triangle Angle Sum Theorem?

Back

The Triangle Angle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.

Tags

CCSS.8.G.A.5

Front

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

Back

It is a right triangle.

Tags

CCSS.4.G.A.2

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60 degrees.

Tags

CCSS.8.G.A.5

Front

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

Back

Subtract the sum of the known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is an exterior angle of a triangle?

Back

An exterior angle is formed by one side of the triangle and the extension of an adjacent side.

Front

What is the relationship between an exterior angle and the two opposite interior angles?

Back

The exterior angle is equal to the sum of the two opposite interior angles.

Tags

CCSS.8.G.A.5

Front

If two angles of a triangle are 34 degrees and 101 degrees, what is the third angle?

Back

The third angle is 45 degrees.

Tags

CCSS.8.G.A.5

Front

What type of angle measures less than 90 degrees?

Back

An acute angle.

Tags

CCSS.4.G.A.1

Front

What type of angle measures exactly 90 degrees?

Back

A right angle.

Tags

CCSS.4.G.A.1

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

An obtuse angle.

Tags

CCSS.4.G.A.1