Lines, Rays and Angles
Angles and Unit Angles
Measuring Unit Angles
Measuring and Drawing Angles
Adding and Subtracting Angle Measures
100
What is a ray?
A) A line that goes on forever in both directions.
B) A part of a line that has a starting point but no endpoint.
C) A figure made of two line segments.
D) A closed shape with four sides.
B) A part of a line that has a starting point but no endpoint.
100
What is an angle?
A) A straight line
B) Two lines that meet at a point
C) A type of shape
D) A closed figure with four sides
B) Two lines that meet at a point.
100
How many degrees are in a right angle?
A) 30°
B) 45°
C) 90°
D) 180°
C) 90 degrees
100
Which of the following is true about a 180° angle?
A) It is a right angle.
B) It is a straight angle.
C) It is an acute angle.
D) It is an obtuse angle.
B) It is a straight angle.
100
If you have an angle of 30° and another angle of 40°, what is the total of both angles?
A) 70°
B) 60°
C) 50°
D) 80°
A) 70 degrees
200
Which of the following is an example of a line?
A) A line segment
B) A ray
C) A line that goes forever in both directions
D) A point
C) A line that goes forever in both directions.
200
If one unit angle is 1°, how many unit angles would fit into a right angle?
Explain your reasoning.
listen to response
200
Which tool is used to measure angles?
A) Ruler
B) Protractor
C) Compass
D) Calculator
B) Protractor
200
How do you measure a 45° angle using a protractor?
A) Align the 0° line with the bottom of the angle and count 45° from the center.
B) Use the ruler to measure the length of the sides.
C) Start at the center of the protractor and count 90° from the top.
D) Use a compass to find the angle.
A) Align the 0° line with the bottom of the angle and count 45° from the center.
200
What is the result when you subtract 50° from 90°?
A) 40°
B) 50°
C) 30°
D) 20°
A) 40 degrees
300
Elijah is drawing a picture and uses a 90° angle for the corners. What type of angle is this?
A) Acute
B) Right
C) Obtuse
D) Straight
B) Right
300
Which of the following is a unit angle?
A) 45°
B) 30°
C) 90°
D) All of the above
D) All of the above
300
If you stack five 20° angles together without any gaps, what would be the total measurement of the new angle?
Show your work.
100 degrees
300
If you have two angles, one measuring 75° and the other measuring 55°, what is the total of both angles? Show your work.
Check student drawings. 75+55= 130 degrees
300
If angle ∠ABC = 40° and angle ∠CBD = 50°, what is the measure of angle ∠ABD?
A. 90°
B. 100°
C. 80°
D. 45°
B
400
Draw and label the following:
A line segment named AB
A ray named CD
An angle named ∠EFG
check student drawings
400
A clock shows that the time is 6:15. What is the angle between the hour and minute hands? Use a protractor to explain how you would measure this angle.
75 degrees
400
Use a protractor to measure the following angle: 
What is the measure of the angle?
65 degree
400
Draw an angle of 120°. Label the two sides and the vertex. Explain how you used the protractor to draw it.
Check student responses
400
A triangle has one angle measuring 50°, and the other two angles are equal. What is the measure of each of the two equal angles?
A) 65°
B) 70°
C) 60°
D) 80°
C) 60 degrees
500
Draw a picture showing a line, a ray and a line segment. Label each part clearly.
Check student drawings
500
Explain what a right angle is and draw a right angle on a piece of paper.
A right angle measures 90 degrees ALWAYS
500
A clock shows that the time is 3:00. What is the angle between the hour and minute hands? Use a protractor to explain how you would measure this angle.
90 degrees
500
Angle ∠XYZ is made up of two smaller angles: ∠XYW = 65° and ∠WYZ = __°.
If the total angle ∠XYZ is 120°, what is the measure of ∠WYZ?
Show your subtraction.
<WYZ= 55 degrees
500
Jamal is measuring angles in a triangle. One angle measures 60°, and the second measures 45°.
What is the measure of the third angle?
(Hint: The angles in a triangle add up to 180°)
85 degrees