Measuring and Drawing Angles

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

What tool do we use to measure angles?

Back

Protractor.

Front

How do you construct a 155° angle using a protractor?

Back

Draw a ray and then use the protractor to mark 155° from the ray.

Front

If an angle measures 82°, what type of angle is it?

Back

Acute angle.

Front

What is the measure of a right angle?

Back

90 degrees.

Front

If an angle measures 125°, what type of angle is it?

Back

Obtuse angle.

Front

What is the first step in measuring an angle with a protractor?

Back

Align the baseline of the protractor with one ray of the angle.