Triangle Angle Sum and Exterior Angle Theorem

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 the Exterior Angle Theorem?

Back

The Exterior Angle Theorem states that the measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.

Tags

CCSS.8.G.A.5

Front

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

Back

Angle C = 180 - (50 + 60) = 70 degrees.

Tags

CCSS.7.G.B.5

Front

What is the measure of an exterior angle if the two non-adjacent interior angles are 40 degrees and 70 degrees?

Back

Exterior angle = 40 + 70 = 110 degrees.

Tags

CCSS.8.G.A.5

Front

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

Back

You can find the measure of an unknown angle by subtracting the sum of the known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is the relationship between the angles in a right triangle?

Back

In a right triangle, one angle is 90 degrees, and the sum of the other two angles is 90 degrees.

Tags

CCSS.8.G.A.5

Front

If one angle of a triangle is 90 degrees and another is 45 degrees, what is the third angle?

Back

The third angle = 180 - (90 + 45) = 45 degrees.

Tags

CCSS.8.G.A.5

Front

What is the formula to calculate the sum of angles in a triangle?

Back

The formula is: Sum of angles = 180 degrees.

Tags

CCSS.8.G.A.5

Front

If angle A is 30 degrees and angle B is 30 degrees, what is angle C?

Back

Angle C = 180 - (30 + 30) = 120 degrees.

Tags

CCSS.7.G.B.5

Front

What is the measure of an exterior angle if the interior angles are 30 degrees and 50 degrees?

Back

Exterior angle = 30 + 50 = 80 degrees.

Tags

CCSS.8.G.A.5