Triangle Angle Sum and Triangle Exterior Angle

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

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 the measure of an exterior angle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two remote interior angles.

Tags

CCSS.8.G.A.5

Front

What are remote interior angles?

Back

Remote interior angles are the two interior angles of a triangle that are not adjacent to a given exterior angle.

Tags

CCSS.8.G.A.5

Front

If one angle of a triangle is 90 degrees, what can you say about the other two angles?

Back

If one angle of a triangle is 90 degrees, the other two angles must sum to 90 degrees, making the triangle a right triangle.

Tags

CCSS.8.G.A.5

Front

What is the relationship between the angles in a triangle and a straight line?

Back

The angles in a triangle and a straight line are supplementary, meaning they add up to 180 degrees.

Tags

CCSS.8.G.A.5

Front

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

Back

To find the measure of an unknown angle in a triangle, subtract the sum of the known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is the formula for finding the sum of the interior angles of a polygon?

Back

The sum of the interior angles of a polygon can be found using the formula (n-2) * 180, where n is the number of sides.

Front

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

Back

In an equilateral triangle, each angle measures 60 degrees.

Tags

CCSS.8.G.A.5

Front

If angle A is 50 degrees and angle B is 60 degrees, what is angle C in triangle ABC?

Back

Angle C can be found by subtracting the sum of angles A and B from 180 degrees: C = 180 - (50 + 60) = 70 degrees.

Tags

CCSS.8.G.A.5