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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 40 · 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.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  2. 2.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  4. 4.An angle measures 165°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  5. 5.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  6. 6.An angle measures 50°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  7. 7.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  9. 9.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 65°. 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.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  22. 22.An angle measures 100°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  23. 23.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 35° and 40°. What is the third angle (in degrees)?
  30. 30.An angle measures 80°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  31. 31.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  32. 32.An angle measures 40°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  33. 33.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 150°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  38. 38.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  39. 39.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?

Answer key

  1. Acute
  2. 20
  3. 130
  4. Obtuse
  5. Right
  6. Acute
  7. 70
  8. Straight
  9. 50
  10. 70
  11. 60
  12. 150
  13. 170
  14. 60
  15. 130
  16. 75
  17. 115
  18. 150
  19. 160
  20. 140
  21. 70
  22. Obtuse
  23. 60
  24. 40
  25. 130
  26. 50
  27. 65
  28. 45
  29. 105
  30. Acute
  31. 85
  32. Acute
  33. 60
  34. 35
  35. 120
  36. 160
  37. 100
  38. Obtuse
  39. 100
  40. 90

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