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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 791 · 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.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  4. 4.An angle measures 15°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  5. 5.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 55° and 45°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  11. 11.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  14. 14.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  15. 15.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  20. 20.An angle measures 100°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  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 of a triangle are 75° and 55°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 20° and 150°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  35. 35.An angle measures 80°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  36. 36.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  39. 39.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  40. 40.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?

Answer key

  1. 150
  2. 50
  3. 60
  4. Acute
  5. 150
  6. 85
  7. 110
  8. 80
  9. 25
  10. Straight
  11. 120
  12. 70
  13. 35
  14. Right
  15. 30
  16. 45
  17. 105
  18. 100
  19. 135
  20. Obtuse
  21. 80
  22. 45
  23. 50
  24. 75
  25. 60
  26. 115
  27. 120
  28. 10
  29. 150
  30. 130
  31. 140
  32. 190
  33. 65
  34. 140
  35. Acute
  36. 130
  37. 180
  38. 60
  39. Acute
  40. 125

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