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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 163 · 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 20°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 90° and 75°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 90°. 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.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  20. 20.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  21. 21.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  25. 25.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  26. 26.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  27. 27.An angle measures 85°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  28. 28.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  34. 34.An angle measures 35°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  35. 35.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?

Answer key

  1. 70
  2. 60
  3. 50
  4. 5
  5. 180
  6. 50
  7. 70
  8. 75
  9. 20
  10. 70
  11. 100
  12. 15
  13. 10
  14. 125
  15. 90
  16. 30
  17. 150
  18. 90
  19. 170
  20. Obtuse
  21. 150
  22. 90
  23. 120
  24. 65
  25. Obtuse
  26. 40
  27. Acute
  28. 65
  29. 155
  30. 140
  31. 130
  32. 10
  33. 190
  34. Acute
  35. 85
  36. 170
  37. 200
  38. 45
  39. 150
  40. 40

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