12/9 Sum of Interior Angles of a Triangle

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 degrees.

Front

If one angle of a triangle is 90 degrees, what are the measures of the other two angles?

Back

The other two angles must sum to 90 degrees.

Front

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

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the measure of angle A if angle B is 60 degrees and angle C is 30 degrees?

Back

Angle A is 90 degrees.

Front

If a triangle has angles measuring 50 degrees and 60 degrees, what is the measure of the third angle?

Back

The third angle measures 70 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 other two angles sum to 90 degrees.

Front

What is an equilateral triangle?

Back

An equilateral triangle has all three angles equal, each measuring 60 degrees.

Front

What is an isosceles triangle?

Back

An isosceles triangle has at least two angles that are equal.

Front

If angle A is 45 degrees and angle B is 45 degrees, what is angle C in an isosceles triangle?

Back

Angle C is 90 degrees.

Front

What is the measure of angle C if angle A is 30 degrees and angle B is 60 degrees?

Back

Angle C is 90 degrees.