Classifying Angles (Grade 4)

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Classifying Angles

1. 
Which of the following best describes the angle shown below?
30° Angle #1
  1. right
  2. acute
  3. obtuse
  4. straight
 
2. 
Which of the following best describes the angle shown below?
100° Angle #2
  1. right
  2. acute
  3. obtuse
  4. straight
3. 
Which of the following best describes the angle shown below?
Straight Angle
  1. right
  2. acute
  3. obtuse
  4. straight
 
4. 
Which of the following best describes the angle shown below?
90° Angle #1
  1. right
  2. acute
  3. obtuse
  4. straight
5. 
In the figure below, [math]angABC[/math] would best be described as                .
Complementary Angle #2
  1. right
  2. acute
  3. obtuse
  4. straight
 
6. 
In the figure below, [math]angDBA[/math] would best be described as                .
Complementary Angle #1
  1. right
  2. acute
  3. obtuse
  4. straight
7. 
Which type of angle is [math]angACB[/math] in the triangle below?
Obtuse Triangle ABC v3
  1. right
  2. acute
  3. obtuse
  4. straight
 
8. 
Which type of angle is [math]angBAC[/math] in the triangle shown below?
Right Triangle ABC v2
  1. right
  2. acute
  3. obtuse
  4. straight
9. 
Which type of angle is [math]angCBA[/math] in the parallelogram below?
Parallelogram ABCD v2
  1. right
  2. acute
  3. obtuse
  4. straight
 
10. 
All the angles in the hexagon shown below are                .
Hexagon
  1. right
  2. acute
  3. obtuse
  4. straight
11. 
Name an obtuse angle shown on the figure below.

Name an acute angle shown on the figure below.
Supplementary Angle #1



 
12. 
Name an obtuse angle shown on the figure below.

Name an acute angle shown on the figure below.
Supplementary Angle #2



13. 
Name an obtuse angle shown on the triangle below.

Name an acute angle shown on the triangle below.
Obtuse Triangle ABC v1



 
14. 
Name an obtuse angle shown on the trapezoid below.

Name an acute angle shown on the trapezoid below.
Trapezoid ABCD



15. 
Identify each of the angles shown on the circle below as right, acute, obtuse, or straight.

[math]angCAD [/math]

[math]angCAB [/math]

[math]angDAO [/math]

[math]angAOB [/math]

[math]angBOD [/math]

[math]angAOD [/math]
Circle ABCD



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