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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 56 · 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 together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  3. 3.An angle measures 60°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  4. 4.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 10 o'clock (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 of a triangle are 40° and 20°. What is the third angle (in degrees)?
  20. 20.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  21. 21.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 25° and 75°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 25° and 115°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  32. 32.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  33. 33.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  38. 38.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  39. 39.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  40. 40.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute

Answer key

  1. 160
  2. 105
  3. Acute
  4. 65
  5. 120
  6. 75
  7. 140
  8. 90
  9. 40
  10. 65
  11. 150
  12. 180
  13. 140
  14. 30
  15. 75
  16. 25
  17. 60
  18. 115
  19. 120
  20. Straight
  21. 100
  22. 90
  23. 180
  24. 220
  25. 80
  26. 30
  27. 60
  28. 10
  29. 75
  30. 40
  31. 150
  32. Obtuse
  33. 10
  34. 120
  35. 140
  36. 80
  37. 30
  38. Acute
  39. 110
  40. Right

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