Triangle angle sum 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

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

Back

The other two angles must sum to 90 degrees, making the triangle a right triangle.

Tags

CCSS.8.G.A.5

Front

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

Back

To find a missing angle, subtract the sum of the known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is the measure of the third angle if two angles of a triangle are 50 degrees and 60 degrees?

Back

The third angle measures 70 degrees (180 - (50 + 60)).

Tags

CCSS.8.G.A.5

Front

If angle A = 40 degrees and angle B = 70 degrees, what is angle C?

Back

Angle C = 70 degrees (180 - (40 + 70)).

Tags

CCSS.7.G.B.5

Front

What is the relationship between the angles in an isosceles triangle?

Back

In an isosceles triangle, the two angles opposite the equal sides are equal.

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

If angle A = 30 degrees and angle B = 30 degrees in a triangle, what is angle C?

Back

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

Tags

CCSS.8.G.A.5

Front

What is the sum of 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

In a triangle, if one angle is 90 degrees and another is 45 degrees, what is the third angle?

Back

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

Tags

CCSS.8.G.A.5