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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 51 · 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 11 o'clock (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 30° and 90°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 40° and 40°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 60° and 40°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  24. 24.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  25. 25.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  26. 26.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  27. 27.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  31. 31.An angle measures 10°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  32. 32.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?

Answer key

  1. 30
  2. 75
  3. 150
  4. 60
  5. 25
  6. 120
  7. 20
  8. 35
  9. 150
  10. 25
  11. 50
  12. 170
  13. 170
  14. 50
  15. 5
  16. 45
  17. 70
  18. 100
  19. 100
  20. 10
  21. 80
  22. 20
  23. 85
  24. Straight
  25. 70
  26. Right
  27. 65
  28. 65
  29. 30
  30. 60
  31. Acute
  32. 200
  33. 210
  34. 15
  35. 75
  36. 160
  37. 30
  38. 120
  39. 140
  40. 130

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