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 60 degrees and another measures 80 degrees, what is the measure of the third angle?

Back

The third angle measures 40 degrees (180 - 60 - 80 = 40).

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 find the measure of an unknown angle in a triangle?

Back

To find the measure of an unknown angle in a triangle, subtract the sum of the known angles from 180 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

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

Back

If two angles of a triangle are equal, it is an isosceles triangle.

Front

What is the measure of the angles in a triangle with angles measuring 45 degrees and 45 degrees?

Back

The third angle measures 90 degrees, making it a right isosceles triangle.

Front

How can you determine if a triangle is obtuse?

Back

A triangle is obtuse if one of its angles measures more than 90 degrees.

Front

What is the sum of the angles in any triangle?

Back

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

Front

If angle A measures 50 degrees and angle B measures 70 degrees, what is angle C?

Back

Angle C measures 60 degrees (180 - 50 - 70 = 60).