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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 33 · 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 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  2. 2.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  8. 8.Two angles of a triangle are 70° and 85°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 220°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  20. 20.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  21. 21.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  22. 22.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 60° and 105°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  28. 28.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  29. 29.Three angles meet at a point. Two of them are 100° and 170°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  35. 35.An angle measures 45°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  36. 36.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  37. 37.An angle measures 10°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  38. 38.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. 150
  3. 60
  4. 45
  5. 80
  6. 50
  7. Straight
  8. 25
  9. 10
  10. 40
  11. 120
  12. 115
  13. 90
  14. 25
  15. 75
  16. 80
  17. 65
  18. 130
  19. 35
  20. Obtuse
  21. Obtuse
  22. 15
  23. 75
  24. 15
  25. 80
  26. 120
  27. 60
  28. Acute
  29. 90
  30. 180
  31. 160
  32. 140
  33. 30
  34. 110
  35. Acute
  36. 160
  37. Acute
  38. 150
  39. 125
  40. 110

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