Missing Angles in Triangles

Front

What is the sum of the angles in a triangle?

Back

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

Front

What do you call an angle that measures less than 90 degrees?

Back

An angle that measures less than 90 degrees is called an acute angle.

Front

What do you call an angle that measures exactly 90 degrees?

Back

An angle that measures exactly 90 degrees is called a right angle.

Front

What do you call an angle that measures more than 90 degrees but less than 180 degrees?

Back

An angle that measures more than 90 degrees but less than 180 degrees is called an obtuse angle.

Front

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

Back

If one angle in a triangle is 90 degrees, it is called a right triangle.

Front

If two angles in a triangle are 45 degrees each, what is the measure of the third angle?

Back

The measure of the third angle is 90 degrees.

Front

What is the missing angle if two angles in a triangle measure 65 degrees and 40 degrees?

Back

The missing angle is 75 degrees.

Front

How do you find the missing angle in a triangle?

Back

To find the missing angle in a triangle, subtract the sum of the known angles from 180 degrees.

Front

What is the measurement of angle B if angle A is 90 degrees and angle C is 33 degrees?

Back

Angle B measures 57 degrees.

Front

What is the measure of the missing angle if one angle is 140 degrees and another is 25 degrees?

Back

The missing angle is 15 degrees.