Additive Angles

Front

What is an instrument for measuring angles?

Back

Protractor

Front

What is the angle measure and classification of x if x = 26 degrees?

Back

26 degrees, acute

Front

What type of angle is 180 degrees?

Back

Straight

Front

What is the measure of angle x if the total of angles in a straight line is 180 degrees and one angle is 67°?

Back

23°

Front

What is an acute angle?

Back

An angle that is less than 90 degrees.

Front

What is an obtuse angle?

Back

An angle that is greater than 90 degrees but less than 180 degrees.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is the sum of angles in a triangle?

Back

180 degrees.

Front

If angle ∠ABD is 67° and angle ∠DBC is 23°, what is the measure of angle ∠ABC?

Back

90° (67° + 23° = 90°).

Front

What is the definition of complementary angles?

Back

Two angles that add up to 90 degrees.