Measuring Angles

What is the measure of a three-quarter turn?

• 180 degrees

• 270 degrees

• 360 degrees

• 90 degrees

What is a straight angle?

• A straight angle measures exactly 90 degrees.

• A straight angle measures exactly 180 degrees.

• A straight angle measures exactly 360 degrees.

• A straight angle measures exactly 45 degrees.

What is an obtuse angle?

• An angle that measures exactly 90 degrees.

• An angle that measures less than 90 degrees.

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

• An angle that measures exactly 180 degrees.

What is the sum of angles in a triangle?

• 90 degrees

• 180 degrees

• 360 degrees

• 120 degrees

What is a complementary angle?

• Two angles are complementary if their measures add up to 90 degrees.

• Two angles that are equal in measure.

• Two angles that add up to 180 degrees.

• Two angles that are adjacent to each other.

What is an acute angle?

• An angle that measures exactly 90 degrees.

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

• An angle that measures less than 90 degrees.

• An angle that measures exactly 180 degrees.

What is the measure of a quarter turn?

• 45 degrees

• 90 degrees

• 180 degrees

• 360 degrees

What is a reflex angle?

• A reflex angle measures less than 90 degrees.

• A reflex angle measures exactly 180 degrees.

• A reflex angle measures more than 180 degrees but less than 360 degrees.

• A reflex angle measures exactly 360 degrees.

What is a full rotation in degrees?

• 180 degrees

• 360 degrees

• 90 degrees

• 270 degrees

How do you measure an angle using a protractor?

• Align the protractor's center point with the angle's vertex and read the measurement where one ray crosses the protractor's scale.

• Place the protractor flat on the table and measure the angle from the edge.

• Use a ruler to measure the length of the angle's rays and calculate the angle.

• Draw a line from the vertex to the protractor's edge and read the angle directly.