Triangle & Angle Measurement Relationships

Front

What is the sum of the angles in a triangle?

Back

180 degrees

Front

What type of angle measures exactly 90 degrees?

Back

Right angle

Front

If two angles in a triangle are 30 degrees and 70 degrees, what is the measure of the third angle?

Back

80 degrees

Front

What do you call angles that are next to each other and share a common side?

Back

Adjacent Angles

Front

What is the term for angles that add up to 90 degrees?

Back

Complementary Angles

Front

What is the term for angles that add up to 180 degrees?

Back

Supplementary Angles

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

Obtuse angle

Front

What is the name of a triangle with all angles less than 90 degrees?

Back

Acute triangle

Front

In a triangle, if one angle is 50 degrees and another is 60 degrees, what is the measure of the third angle?

Back

70 degrees

Front

What is the relationship between the angles in a linear pair?

Back

They are supplementary (add up to 180 degrees).