Triangle sum and Exterior Angle Theorem

Front

What is the Triangle Sum Theorem?

Back

The Triangle 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 an exterior angle of a triangle?

Back

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

Front

What does the Exterior Angle Theorem state?

Back

The Exterior Angle Theorem states that the measure of an exterior angle 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 = 50 degrees and angle B = 60 degrees, what is angle C in triangle ABC?

Back

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

Tags

CCSS.8.G.A.5

Front

How do you find the measure of an exterior angle if the interior angles are 40 degrees and 70 degrees?

Back

The exterior angle = 40 + 70 = 110 degrees.

Tags

CCSS.8.G.A.5

Front

What is the relationship between the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Tags

CCSS.8.G.A.5

Front

If angle 1 = 30 degrees and angle 2 = 50 degrees, what is angle 3?

Back

Angle 3 = 180 - (30 + 50) = 100 degrees.

Tags

CCSS.7.G.B.5

Front

What is the measure of an exterior angle if the two remote interior angles are 45 degrees and 55 degrees?

Back

The exterior angle = 45 + 55 = 100 degrees.

Tags

CCSS.8.G.A.5

Front

In triangle XYZ, if angle X = 40 degrees and angle Y = 60 degrees, what is angle Z?

Back

Angle Z = 180 - (40 + 60) = 80 degrees.

Tags

CCSS.8.G.A.5