Interior and Exterior Triangle Angles

Front

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

Back

The sum of the interior angles of a triangle is 180 degrees.

Front

What is the measure of angle A if angle B is 62 degrees and angle C is 56 degrees?

Back

Angle A = 180 - (62 + 56) = 62 degrees.

Front

If one angle of a triangle is 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

What is the relationship between the exterior angle and the interior angles of a triangle?

Back

The exterior angle is equal to the sum of the two opposite interior angles.

Front

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

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the measure of angle B if angle A is 34 degrees and angle C is 112 degrees?

Back

Angle B = 180 - (34 + 112) = 34 degrees.

Front

What is the formula for calculating the exterior angle of a triangle?

Back

Exterior angle = Interior angle 1 + Interior angle 2.

Front

If angle A is 45 degrees and angle B is 45 degrees, what is angle C?

Back

Angle C = 180 - (45 + 45) = 90 degrees.

Front

What is the definition of an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90 degrees.

Front

What is the definition of an obtuse triangle?

Back

An obtuse triangle is a triangle where one angle is greater than 90 degrees.