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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 647 · 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.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  4. 4.What is the smaller angle between the hands of a clock at 6 o'clock (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 45° and 45°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  12. 12.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  14. 14.An angle measures 140°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  15. 15.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  16. 16.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  27. 27.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  28. 28.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  30. 30.An angle measures 70°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  31. 31.Two angles of a triangle are 85° and 85°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 65° and 95°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 30° and 55°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  36. 36.An angle measures 50°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  37. 37.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 20° and 65°. What is the third angle (in degrees)?
  39. 39.An angle measures 55°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  40. 40.An angle measures 160°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse

Answer key

  1. 30
  2. 15
  3. Straight
  4. 180
  5. 120
  6. 90
  7. 60
  8. 130
  9. 135
  10. 20
  11. Right
  12. 85
  13. 55
  14. Obtuse
  15. Obtuse
  16. 55
  17. 125
  18. 150
  19. 30
  20. 80
  21. 230
  22. 90
  23. 120
  24. 55
  25. 230
  26. 150
  27. Obtuse
  28. 100
  29. 20
  30. Acute
  31. 10
  32. 85
  33. 20
  34. 95
  35. 80
  36. Acute
  37. 45
  38. 95
  39. Acute
  40. Obtuse

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