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 measures 30 degrees and another measures 60 degrees, what is the measure of the third angle?

Back

90 degrees.

Front

Can three angles measuring 30°, 60°, and 90° form a triangle?

Back

Yes, because their sum is 180 degrees.

Front

What is the measure of the third angle if two angles of a triangle are 60 degrees and 80 degrees?

Back

40 degrees.

Front

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

Back

45 degrees.

Front

What is the measure of angle b if the options are 36°, 56°, 63°, and 117° and the correct answer is 36°?

Back

Angle b measures 36 degrees.

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.

Front

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

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the measure of the angles in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

What is the measure of the angles in an isosceles triangle?

Back

In an isosceles triangle, the two equal angles can be found by using the formula: 180 - (2 * angle).