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Angle Addition - Worksheet 5 - 4th Grade

Medium

Read angles in degrees, classify them and add adjacent angle measures.

medium: Practice the same exercise types with a fresh numbered set.

14 problems · 15-20 minutes · Skills: angles, addition, subtraction

About This Worksheet

This medium-level worksheet contains 14 problems designed for 4th Grade students practicing angle addition. Medium worksheets introduce larger numbers and varied question formats to deepen understanding and build fluency.

Read labeled dimensions and coordinates. Recall multiplication facts and length units.

  • Read angles in degrees, classify them and add adjacent angle measures.
  • Check your result using the method in the example before moving to the next question.

How to Solve: Worked Example

Example Problem: Ray OB lies inside angle AOC. Angle AOB is 62° and angle BOC is 30°. Find angle AOC.
Solution Steps:
  1. Adjacent angles add to make the whole angle.
Answer: 92 degrees
Tip: Check your result using the method in the example before moving to the next question.
1
Ray OB lies inside angle AOC. Angle AOB is 61° and angle BOC is 27°. Find angle AOC.
2
Ray OB lies inside angle AOC. Angle AOB is 60° and angle BOC is 35°. Find angle AOC.
3
Ray OB lies inside angle AOC. Angle AOB is 25° and angle BOC is 13°. Find angle AOC.
4
Ray OB lies inside angle AOC. Angle AOB is 14° and angle BOC is 21°. Find angle AOC.
5
Ray OB lies inside angle AOC. Angle AOB is 55° and angle BOC is 20°. Find angle AOC.
6
Ray OB lies inside angle AOC. Angle AOB is 43° and angle BOC is 37°. Find angle AOC.
7
Ray OB lies inside angle AOC. Angle AOB is 15° and angle BOC is 79°. Find angle AOC.
8
Ray OB lies inside angle AOC. Angle AOB is 63° and angle BOC is 53°. Find angle AOC.
9
Ray OB lies inside angle AOC. Angle AOB is 43° and angle BOC is 79°. Find angle AOC.
10
Ray OB lies inside angle AOC. Angle AOB is 45° and angle BOC is 25°. Find angle AOC.
11
Ray OB lies inside angle AOC. Angle AOB is 66° and angle BOC is 23°. Find angle AOC.
12
Ray OB lies inside angle AOC. Angle AOB is 79° and angle BOC is 26°. Find angle AOC.
13
Ray OB lies inside angle AOC. Angle AOB is 30° and angle BOC is 43°. Find angle AOC.
14
Ray OB lies inside angle AOC. Angle AOB is 73° and angle BOC is 47°. Find angle AOC.

Answer Key

1. 88 degrees2. 95 degrees3. 38 degrees4. 35 degrees5. 75 degrees6. 80 degrees7. 94 degrees8. 116 degrees9. 122 degrees10. 70 degrees11. 89 degrees12. 105 degrees13. 73 degrees14. 120 degrees

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Frequently Asked Questions

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Each subtopic has 10 worksheets: Worksheets 1-3 are Easy, 4-7 are Medium, and 8-10 are Hard. Start with Easy worksheets to build confidence, then progress to harder ones.

What skills does this angles worksheet cover?

This worksheet focuses on angles, addition, subtraction. It is designed for 4th Grade students and provides structured practice through varied problem types with a worked example to guide students before they begin.

Can I use this worksheet in my classroom?

Yes. All worksheets on K12Worksheets are free for classroom use. You can print copies for your entire class. With 10 worksheets per subtopic at three difficulty levels, you have plenty of options for differentiated instruction and individualized practice.

How many problems are on this worksheet?

This worksheet contains 14 problems. It typically takes 15-20 minutes to complete. An answer key with all solutions is included so parents and teachers can check work quickly.