Triangle Sum Theorem

Front

What does the Triangle Sum Theorem state?

Back

The Triangle Sum Theorem states that the sum of all angles in a triangle is 180°.

Front

If one angle of a triangle is 50° and another is 60°, what is the measure of the third angle?

Back

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

Front

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

Back

Each angle in an equilateral triangle measures 60°.

Front

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

Back

Subtract the sum of the known angles from 180°.

Front

If a triangle has angles measuring 30° and 90°, what is the measure of the third angle?

Back

The third angle is 60° (180° - 30° - 90° = 60°).

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is always 180°.

Front

In a triangle, if one angle measures 45°, what is the maximum possible measure of the other two angles?

Back

The maximum possible measure of the other two angles is 135° (45° + 135° + 0° = 180°).

Front

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

Back

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

Front

If two angles of a triangle are equal, what type of triangle is it?

Back

It is an isosceles triangle.

Front

What is the measure of the angles in a triangle if one angle is 80° and the other is 50°?

Back

The third angle measures 50° (180° - 80° - 50° = 50°).