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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 766 · 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.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 70° and 50°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  5. 5.Two angles of a triangle are 80° and 65°. What is the third 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.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 20° and 150°. What is the third angle (in degrees)?
  10. 10.An angle measures 110°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 35° and 115°. What is the third angle (in degrees)?
  14. 14.An angle measures 160°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  15. 15.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  17. 17.An angle measures 25°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  18. 18.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  22. 22.An angle measures 60°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  23. 23.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  29. 29.An angle measures 85°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  30. 30.An angle measures 70°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  31. 31.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  39. 39.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  40. 40.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?

Answer key

  1. 40
  2. 65
  3. 60
  4. 60
  5. 35
  6. 70
  7. 70
  8. 150
  9. 10
  10. Obtuse
  11. 180
  12. 220
  13. 30
  14. Obtuse
  15. 90
  16. 105
  17. Acute
  18. 30
  19. 80
  20. 150
  21. 155
  22. Acute
  23. 130
  24. 210
  25. 150
  26. 130
  27. 30
  28. 10
  29. Acute
  30. Acute
  31. 60
  32. 150
  33. 30
  34. 210
  35. 70
  36. 50
  37. 130
  38. 85
  39. Straight
  40. 35

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