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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 643 · 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 2 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 50° and 120°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  9. 9.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 85°. 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.An angle measures 55°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  17. 17.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 60° and 50°. What is the third angle (in degrees)?
  20. 20.An angle measures 170°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  21. 21.Two angles of a triangle are 40° and 45°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 20° and 55°. What is the third angle (in degrees)?
  23. 23.An angle measures 45°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  24. 24.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  34. 34.An angle measures 95°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  35. 35.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  37. 37.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  38. 38.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?

Answer key

  1. 60
  2. 10
  3. 120
  4. 80
  5. 25
  6. 50
  7. 50
  8. Straight
  9. 55
  10. 95
  11. 70
  12. 140
  13. 160
  14. 5
  15. 90
  16. Acute
  17. 210
  18. 45
  19. 70
  20. Obtuse
  21. 95
  22. 105
  23. Acute
  24. 150
  25. 135
  26. 220
  27. 180
  28. 55
  29. 120
  30. 100
  31. 125
  32. 60
  33. 90
  34. Obtuse
  35. 145
  36. 75
  37. Right
  38. 80
  39. 15
  40. 30

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