Vocabulary
The direction hands move around the clock.
What is clockwise?
This angle measures exactly 90 degrees.
What is a right angle?
360/360 is equal to this many degrees.
What is 360 degrees?
The tool used to measure the size of an angle.
What is a protractor?
Adding two angles together to make a new one.
What is finding the sum of its parts?
The opposite direction the hands move around a clock.
What is counterclockwise?
This angle measures more than 0 degrees but less than 90 degrees.
What is an acute angle?
1/4 of a circle is equal to this many degrees.
What is 90 degrees?
This should always be on the zero line when using a protractor.
What is a ray?
Finding the missing portion on an angle.
What is finding the unknown?
The units of measure used to measure an angle.
What are degrees?
This angle measures exactly 180 degrees.
What is a straight angle?
The fraction that represents 270 degrees of a circle.
What is 270/360?
This should be directly under the "hole" or dot in your protractor when measuring angles.
What is the vertex?
Angle ABD equals 32 degrees and angle DBC equals 64 degrees. This is the measure of angle ABC. What type of angle is angle ABC?
What is 96 degrees? What is an obtuse angle?
What is a vertex?
This angle measures more than 90 degrees but less than 180 degrees.
What is an obtuse angle?
The degrees equal to 1/3 of a circle. Also write this as a fraction?
What is 120 degrees? What is 120/360?
You should use these numbers on a protractor when your bottom ray is pointing to the left and your angle opens clockwise or to the right.
What are the outside numbers?
Angle QRS equals 120 degrees. Angle TRS equals 45 degrees. This is the measure of angle QRT. What type of angle is angle TRS?
What is 75 degrees? What is an acute angle?
A line that has an endpoint and continues without end in the other direction.
What is a ray?
This is formed by two rays that have the same vertex.
What is an angle?
The degrees equal to 1/10 of a circle.
What is 36 degrees?
You should use these numbers on a protractor when your bottom ray is pointing to the right and your angle opens counterclockwise or to the left.
What are the inside numbers?
Angle EFG measures 32 degrees. Angle EFH equals 12 degrees. This is the measure of angle HFG. What type of angle is angle EFG?
What is 20 degrees? What is an acute angle?