Finding Missing Angles ( HW)

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What is an acute angle?

Back

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

Front

What is an obtuse angle?

Back

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

Front

What is a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

How do you find the missing angle in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees. Subtract the sum of the known angles from 180 to find the missing angle.

Front

If one angle measures 40 degrees, what is the measure of the other angle if they are complementary?

Back

The other angle measures 50 degrees (90 - 40 = 50).

Front

If angle A measures 30 degrees and angle B measures 60 degrees, what is the measure of angle C in a triangle?

Back

Angle C measures 90 degrees (180 - 30 - 60 = 90).

Front

What is the sum of angles on a straight line?

Back

The sum of angles on a straight line is always 180 degrees.

Front

What is the relationship between complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.