Missing Angles in a Triangle

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

If two angles in a triangle are known, how can you find the missing angle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the measure of the missing angle in a triangle with angles 80° and 60°?

Back

40°

Front

In a triangle, if one angle measures 36° and another measures 51°, what is the measure of the third angle?

Back

93°

Front

If two angles in a triangle measure 11° and 155°, what is the measure of the third angle?

Back

14°

Front

What is the missing angle in a triangle with angles measuring 82° and 44°?

Back

54°

Front

In a triangle, if one angle measures 33° and another measures 118°, what is the measure of the third angle?

Back

29°

Front

What do you call a triangle with one angle greater than 90 degrees?

Back

An obtuse triangle.

Front

What do you call a triangle with all angles less than 90 degrees?

Back

An acute triangle.

Front

What do you call a triangle with one angle equal to 90 degrees?

Back

A right triangle.