Triangle Sum Theorem

Front

What does the Triangle Sum Theorem state?

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 90 degrees, what can you say about the other two angles?

Back

The other two angles must sum to 90 degrees, since the total must equal 180 degrees.

Front

In a triangle, if two angles measure 45 degrees each, what is the measure of the third angle?

Back

The third angle measures 90 degrees.

Front

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

Back

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

Front

If a triangle has angles measuring 30 degrees and 60 degrees, what is the measure of the third angle?

Back

The third angle measures 90 degrees.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

If one angle of a triangle is 50 degrees and another is 70 degrees, what is the measure of the third angle?

Back

The third angle measures 60 degrees.

Front

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

Back

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

Front

Can a triangle have angles measuring 100 degrees, 40 degrees, and 30 degrees?

Back

No, because the sum of these angles is 170 degrees, which is less than 180 degrees.

Front

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

Back

The sum of angles in a triangle is calculated as: Angle1 + Angle2 + Angle3 = 180 degrees.