Solving for a Missing Angle

Front

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

Back

180 degrees.

Front

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

Back

Right triangle.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An angle that measures more than 90 degrees but less than 180 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 the third angle if two angles in a triangle are 30 degrees and 70 degrees?

Back

80 degrees.

Front

What is the definition of a right angle?

Back

An angle that measures exactly 90 degrees.

Front

In a right triangle, what is the relationship between the angles?

Back

One angle is 90 degrees, and the other two angles are acute.

Front

What is the measure of angle A if angle B is 96 degrees and angle C is 40 degrees?

Back

Angle A measures 44 degrees.

Front

What type of angle is formed when two rays meet at a point and create an angle greater than 90 degrees?

Back

Obtuse angle.