Understanding Angles for Grade 5

What is the measurement of a right angle?

• 180 degrees

• 90 degrees

• 360 degrees

• 45 degrees

How do you measure an angle using a protractor?

• Align the protractor's midpoint with the angle's vertex and read the measurement where the other side intersects the scale.

• Use a ruler to measure the angle's width and divide by two.

• Estimate the angle by comparing it to a known angle without using the protractor.

• Place the protractor flat on the table and measure the angle's length.

Identify the type of angle that measures 45 degrees.

• Right angle

• Obtuse angle

• Acute angle

• Reflex angle

What type of angle is greater than 90 degrees but less than 180 degrees?

• Straight angle

• Obtuse angle

• Acute angle

• Right angle

If angle A measures 30 degrees and angle B measures 60 degrees, what is the sum of angle A and angle B?

• 60 degrees

• 45 degrees

• 120 degrees

• 90 degrees

Draw an angle that measures 120 degrees.

• An angle that measures 45 degrees.

• An angle that measures 90 degrees.

• An angle that measures 180 degrees.

• An angle that measures 120 degrees.

What type of angle is formed by the hands of a clock at 3:00?

• Acute angle

• Right angle

• Straight angle

• Obtuse angle

If you have a straight angle, what is its measurement?

• 180 degrees

• 45 degrees

• 360 degrees

• 90 degrees

How do you identify an acute angle?

• An acute angle is an angle that measures more than 180 degrees.

• An acute angle is an angle that measures between 90 and 180 degrees.

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

• An acute angle is an angle that measures exactly 90 degrees.

If angle C measures 150 degrees, what type of angle is it?

• Acute angle

• Straight angle

• Obtuse angle

• Right angle