Angle Addition Worksheets
Read angles in degrees, classify them and add adjacent angle measures.
Before you begin
Read labeled dimensions and coordinates. Recall multiplication facts and length units.
Worked example
Ray OB lies inside angle AOC. Angle AOB is 62° and angle BOC is 30°. Find angle AOC.
- Adjacent angles add to make the whole angle.
Answer: 92 degrees
Check your result using the method in the example before moving to the next question.
Choose your level
These sets use the same exercise types and number ranges across level labels. Choose a fresh set for additional practice.
- Easy: Start with the preview and follow the worked example.
- Medium: Practice the same exercise types with a fresh numbered set.
- Hard: Use another set to practice explaining and checking your answers.
Questions and answer calculations checked on 2026-09-17. How we check worksheets. Free for personal and classroom use.
Preview and print an easy set
Try six questions below, or choose a full set at your level.
1
Ray OB lies inside angle AOC. Angle AOB is 36° and angle BOC is 45°. Find angle AOC.
2
Ray OB lies inside angle AOC. Angle AOB is 13° and angle BOC is 36°. Find angle AOC.
3
Ray OB lies inside angle AOC. Angle AOB is 49° and angle BOC is 11°. Find angle AOC.
4
Ray OB lies inside angle AOC. Angle AOB is 27° and angle BOC is 39°. Find angle AOC.
5
Ray OB lies inside angle AOC. Angle AOB is 69° and angle BOC is 26°. Find angle AOC.
6
Ray OB lies inside angle AOC. Angle AOB is 71° and angle BOC is 33°. Find angle AOC.
Answer Key
1. 81 degrees2. 49 degrees3. 60 degrees4. 66 degrees5. 95 degrees6. 104 degrees