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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 266 · 40 sums
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The method (Know the totals): Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°. On a straight line: the two angles add up to 180°. In a triangle: the three angles add up to 180°. Around a point: 360°. Clock: each hour mark is 30° apart (360° ÷ 12).

NameDateTime takenScore ___ / 40
  1. 1.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 95° and 45°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 70° and 55°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 70° and 65°. What is the third angle (in degrees)?
  21. 21.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  22. 22.An angle measures 160°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  23. 23.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 35° and 95°. What is the third angle (in degrees)?
  27. 27.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  28. 28.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  30. 30.An angle measures 60°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  31. 31.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 50° and 60°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?

Answer key

  1. 40
  2. 30
  3. 20
  4. 80
  5. 145
  6. 70
  7. 40
  8. 100
  9. 55
  10. 45
  11. 220
  12. 10
  13. 85
  14. 60
  15. 180
  16. 90
  17. 60
  18. 150
  19. 110
  20. 45
  21. Right
  22. Obtuse
  23. 60
  24. 100
  25. 135
  26. 50
  27. Straight
  28. 140
  29. 150
  30. Acute
  31. 125
  32. 140
  33. 180
  34. 170
  35. 70
  36. 165
  37. 120
  38. 75
  39. 210
  40. 40

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