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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 765 · 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.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  3. 3.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  7. 7.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 20° and 130°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  13. 13.An angle measures 120°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  14. 14.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  15. 15.An angle measures 30°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  16. 16.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 35° and 60°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  32. 32.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  33. 33.An angle measures 150°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  34. 34.An angle measures 60°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  35. 35.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 40° and 130°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 60° and 100°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 95° and 75°. What is the third angle (in degrees)?
  39. 39.An angle measures 20°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  40. 40.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?

Answer key

  1. 30
  2. Straight
  3. 170
  4. 155
  5. 90
  6. Right
  7. 70
  8. 65
  9. 30
  10. 30
  11. 60
  12. 140
  13. Obtuse
  14. 160
  15. Acute
  16. 85
  17. 120
  18. 115
  19. 130
  20. 160
  21. 15
  22. 140
  23. 145
  24. 60
  25. 75
  26. 120
  27. 85
  28. 90
  29. 30
  30. 40
  31. 160
  32. Acute
  33. Obtuse
  34. Acute
  35. 60
  36. 10
  37. 20
  38. 10
  39. Acute
  40. 150

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