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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 75 · 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 of a triangle are 80° and 30°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  6. 6.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  8. 8.An angle measures 40°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  9. 9.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 30° and 50°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  17. 17.An angle measures 130°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  18. 18.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  19. 19.An angle measures 85°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  20. 20.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  26. 26.An angle measures 105°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  27. 27.An angle measures 140°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  28. 28.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  29. 29.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  31. 31.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  32. 32.An angle measures 60°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  33. 33.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 55° and 25°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?

Answer key

  1. 70
  2. 160
  3. 105
  4. 25
  5. Straight
  6. 180
  7. 35
  8. Acute
  9. 60
  10. 160
  11. 30
  12. 55
  13. 130
  14. 75
  15. 100
  16. 120
  17. Obtuse
  18. 5
  19. Acute
  20. 65
  21. 150
  22. 250
  23. 90
  24. 30
  25. 150
  26. Obtuse
  27. Obtuse
  28. Acute
  29. 190
  30. 150
  31. Obtuse
  32. Acute
  33. 70
  34. 90
  35. 100
  36. 90
  37. 85
  38. 50
  39. 60
  40. 120

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