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Complementary angles

Year 4 maths · Fieldbook Learning

Name ______________________ Date __________

Complementary angles add up to a right angle. Include the degree sign if you like.

  1. Two angles make a right angle together (they are complementary). One measures 35°. What does the other measure?
  2. Angle A and angle B are complementary. One measures 37°. What does the other measure?
  3. Two angles make a right angle together (they are complementary). One measures 70°. What does the other measure?
  4. Two angles make a right angle together (they are complementary). One measures 40°. What does the other measure?
  5. Two angles make a right angle together (they are complementary). One measures 24°. What does the other measure?
  6. Two angles are complementary. One measures 32°. What does the other measure?
  7. Angle A and angle B are complementary. One measures 16°. What does the other measure?
  8. Angle A and angle B are complementary. One measures 69°. What does the other measure?
  9. Angle A and angle B are complementary. One measures 33°. What does the other measure?
  10. Angle A and angle B are complementary. One measures 13°. What does the other measure?
  11. Two angles are complementary. One measures 35°. What does the other measure?
  12. Two angles are complementary. One measures 31°. What does the other measure?
  13. Two angles make a right angle together (they are complementary). One measures 58°. What does the other measure?
  14. Angle A and angle B are complementary. One measures 31°. What does the other measure?
  15. Two angles make a right angle together (they are complementary). One measures 5°. What does the other measure?
  16. Two angles are complementary. One measures 47°. What does the other measure?
  17. Two angles make a right angle together (they are complementary). One measures 9°. What does the other measure?
  18. Two angles make a right angle together (they are complementary). One measures 1°. What does the other measure?
  19. Two angles are complementary. One measures 52°. What does the other measure?
  20. Angle A and angle B are complementary. One measures 41°. What does the other measure?
More free practice: fieldbooklearning.com/au/practice/year-4/complementary-angles/

Answer key: Complementary angles

  1. 55°
  2. 53°
  3. 20°
  4. 50°
  5. 66°
  6. 58°
  7. 74°
  8. 21°
  9. 57°
  10. 77°
  11. 55°
  12. 59°
  13. 32°
  14. 59°
  15. 85°
  16. 43°
  17. 81°
  18. 89°
  19. 38°
  20. 49°