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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 151 · 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.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  3. 3.An angle measures 120°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.Two angles of a triangle are 45° and 90°. What is the third angle (in degrees)?
  6. 6.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  7. 7.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  9. 9.An angle measures 75°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  10. 10.Two angles of a triangle are 95° and 20°. 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 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  13. 13.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  14. 14.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  17. 17.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  18. 18.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  29. 29.An angle measures 20°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  30. 30.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  32. 32.An angle measures 80°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  33. 33.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  34. 34.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  35. 35.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 65° and 105°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?

Answer key

  1. 150
  2. Straight
  3. Obtuse
  4. 30
  5. 45
  6. Acute
  7. 40
  8. 75
  9. Acute
  10. 65
  11. 50
  12. Obtuse
  13. Right
  14. 25
  15. 20
  16. 90
  17. Obtuse
  18. 60
  19. 85
  20. 150
  21. 30
  22. 70
  23. 60
  24. 30
  25. 115
  26. 120
  27. 50
  28. 60
  29. Acute
  30. 220
  31. 40
  32. Acute
  33. 200
  34. Acute
  35. 120
  36. 60
  37. 10
  38. 240
  39. 45
  40. 130

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