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.

Front

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

Back

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

Front

What is the formula to find the measure of an unknown angle in a triangle?

Back

The formula is: x = 180 - (sum of the other two angles).

Front

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

Back

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

Front

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

Back

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

Front

If a triangle has angles measuring 30 degrees and 70 degrees, what is the measure of the third angle?

Back

The third angle measures 80 degrees (30 + 70 + 80 = 180).

Front

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

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

How do you solve for an unknown angle in a triangle when given two angles?

Back

Subtract the sum of the two known angles from 180 degrees.

Front

If one angle of a triangle is 38 degrees and the other is 90 degrees, what is the measure of the third angle?

Back

The third angle measures 52 degrees (38 + 90 + 52 = 180).

Front

What is the sum of the angles in any triangle?

Back

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