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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 770 · 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.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  2. 2.An angle measures 15°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  3. 3.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  5. 5.An angle measures 160°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  6. 6.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  8. 8.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 65° and 105°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  17. 17.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  18. 18.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 60° and 45°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 50° and 120°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  33. 33.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  34. 34.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?

Answer key

  1. 15
  2. Acute
  3. 180
  4. 85
  5. Obtuse
  6. 120
  7. Straight
  8. 15
  9. 35
  10. 190
  11. 80
  12. 160
  13. 100
  14. 10
  15. 95
  16. 30
  17. Acute
  18. 45
  19. 50
  20. 90
  21. 40
  22. 165
  23. 75
  24. 210
  25. 180
  26. 60
  27. 55
  28. 60
  29. 120
  30. 65
  31. 10
  32. 130
  33. Right
  34. 70
  35. 70
  36. 10
  37. 20
  38. 150
  39. 75
  40. 60

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