Interior and Exterior Angles of a Triangle

Front

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

Back

The sum of the interior angles of any triangle is 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is an exterior angle of a triangle?

Back

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

Front

How do you calculate an exterior angle of a triangle?

Back

An exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Tags

CCSS.8.G.A.5

Front

What is the relationship between interior and exterior angles in a triangle?

Back

The exterior angle is equal to the sum of the two non-adjacent interior angles.

Tags

CCSS.8.G.A.5

Front

If one interior angle of a triangle is 60 degrees, what is the sum of the other two angles?

Back

The sum of the other two angles is 120 degrees.

Tags

CCSS.8.G.A.5

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

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

Back

In an isosceles triangle, the two base angles are equal, and the sum of all three angles is 180 degrees.

Tags

CCSS.8.G.A.5

Front

If a triangle has angles measuring 45 degrees and 55 degrees, what is the measure of the third angle?

Back

The third angle measures 80 degrees.

Tags

CCSS.8.G.A.5

Front

What is the formula for finding the measure of an interior angle in a triangle?

Back

The formula is: Interior Angle = 180 degrees - (Sum of the other two interior angles).

Tags

CCSS.8.G.A.5

Front

How can you determine if a triangle is valid based on its angles?

Back

A triangle is valid if the sum of its interior angles equals 180 degrees.

Tags

CCSS.8.G.A.5