Triangle Sum 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.

Front

If one angle of a triangle is 60 degrees and another is 70 degrees, what is the measure of the third angle?

Back

The third angle is 50 degrees (180 - 60 - 70 = 50).

Front

What is the measure of angle A if angle B is 45 degrees and angle C is 85 degrees?

Back

Angle A measures 50 degrees (180 - 45 - 85 = 50).

Front

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

Back

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

Front

What is the measure of angle B if angle A is 30 degrees and angle C is 120 degrees?

Back

Angle B measures 30 degrees (180 - 30 - 120 = 30).

Front

If a triangle has angles measuring 90 degrees and 45 degrees, what is the measure of the third angle?

Back

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

Front

What is the sum of the angles in any triangle?

Back

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

Front

If angle A is 75 degrees and angle B is 60 degrees, what is angle C?

Back

Angle C measures 45 degrees (180 - 75 - 60 = 45).

Front

What is the measure of angle C if angle A is 50 degrees and angle B is 80 degrees?

Back

Angle C measures 50 degrees (180 - 50 - 80 = 50).

Front

In a triangle, if one angle is 90 degrees, what type of triangle is it?

Back

It is a right triangle.