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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 142 · 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 6 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  6. 6.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  7. 7.An angle measures 140°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  8. 8.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  10. 10.Two angles of a triangle are 25° and 130°. 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.An angle measures 80°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  13. 13.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  14. 14.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  18. 18.An angle measures 20°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  19. 19.Two angles of a triangle are 20° and 85°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 70° and 75°. What is the third angle (in degrees)?
  26. 26.An angle measures 25°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  27. 27.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  30. 30.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  31. 31.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  40. 40.An angle measures 110°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse

Answer key

  1. 180
  2. 60
  3. 150
  4. 30
  5. 60
  6. Acute
  7. Obtuse
  8. 5
  9. Right
  10. 25
  11. 50
  12. Acute
  13. Straight
  14. 30
  15. 110
  16. 125
  17. 90
  18. Acute
  19. 75
  20. 60
  21. 80
  22. 45
  23. 170
  24. 150
  25. 35
  26. Acute
  27. 190
  28. 80
  29. 90
  30. Acute
  31. 50
  32. 40
  33. 120
  34. 55
  35. 75
  36. 190
  37. 140
  38. 100
  39. 30
  40. Obtuse

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