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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 517 · 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.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  2. 2.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  8. 8.Two angles of a triangle are 55° and 115°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 20°. 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.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 60° and 45°. What is the third angle (in degrees)?
  17. 17.An angle measures 45°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  18. 18.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  19. 19.An angle measures 130°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  20. 20.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  21. 21.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  22. 22.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  23. 23.Two angles of a triangle are 20° and 130°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  29. 29.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  30. 30.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  39. 39.An angle measures 85°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  40. 40.Two angles of a triangle are 75° and 25°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 140
  3. 15
  4. 20
  5. 25
  6. 75
  7. Acute
  8. 10
  9. 120
  10. 90
  11. 25
  12. 70
  13. 85
  14. 95
  15. 140
  16. 75
  17. Acute
  18. 30
  19. Obtuse
  20. Right
  21. Obtuse
  22. 120
  23. 30
  24. 180
  25. 65
  26. 230
  27. 5
  28. 120
  29. Acute
  30. 180
  31. 85
  32. 220
  33. 90
  34. 60
  35. 90
  36. 60
  37. 90
  38. 170
  39. Acute
  40. 80

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