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Angle Addition - Worksheet 3 - 4th Grade

Easy

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

easy: Start with the preview and follow the worked example.

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

About This Worksheet

This easy-level worksheet contains 12 problems designed for 4th Grade students practicing angle addition. Easy worksheets use simpler numbers and straightforward problem types to build confidence and reinforce foundational skills.

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 49° and angle BOC is 72°. Find angle AOC.
2
Ray OB lies inside angle AOC. Angle AOB is 37° and angle BOC is 71°. Find angle AOC.
3
Ray OB lies inside angle AOC. Angle AOB is 37° and angle BOC is 12°. Find angle AOC.
4
Ray OB lies inside angle AOC. Angle AOB is 21° and angle BOC is 66°. Find angle AOC.
5
Ray OB lies inside angle AOC. Angle AOB is 62° and angle BOC is 59°. Find angle AOC.
6
Ray OB lies inside angle AOC. Angle AOB is 21° and angle BOC is 35°. Find angle AOC.
7
Ray OB lies inside angle AOC. Angle AOB is 31° and angle BOC is 52°. Find angle AOC.
8
Ray OB lies inside angle AOC. Angle AOB is 39° and angle BOC is 42°. Find angle AOC.
9
Ray OB lies inside angle AOC. Angle AOB is 51° and angle BOC is 65°. Find angle AOC.
10
Ray OB lies inside angle AOC. Angle AOB is 72° and angle BOC is 79°. Find angle AOC.
11
Ray OB lies inside angle AOC. Angle AOB is 44° and angle BOC is 28°. Find angle AOC.
12
Ray OB lies inside angle AOC. Angle AOB is 23° and angle BOC is 37°. Find angle AOC.

Answer Key

1. 121 degrees2. 108 degrees3. 49 degrees4. 87 degrees5. 121 degrees6. 56 degrees7. 83 degrees8. 81 degrees9. 116 degrees10. 151 degrees11. 72 degrees12. 60 degrees

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Frequently Asked Questions

How do I download this angle addition - worksheet 3 worksheet?

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How do I find worksheets at different difficulty levels?

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 12 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.