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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 233 · 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 45°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  5. 5.An angle measures 120°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  6. 6.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  7. 7.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  12. 12.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  13. 13.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 75° and 35°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  18. 18.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  22. 22.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  23. 23.Two angles of a triangle are 25° and 80°. What is the third 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.An angle measures 150°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  26. 26.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 65° and 80°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  33. 33.An angle measures 100°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  34. 34.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?

Answer key

  1. 135
  2. 60
  3. 120
  4. 60
  5. Obtuse
  6. Acute
  7. 15
  8. 160
  9. 240
  10. 150
  11. 85
  12. Acute
  13. 95
  14. 70
  15. 130
  16. 150
  17. Right
  18. 80
  19. 120
  20. 130
  21. 200
  22. Acute
  23. 75
  24. 150
  25. Obtuse
  26. 30
  27. 35
  28. 150
  29. 60
  30. 170
  31. 90
  32. 170
  33. Obtuse
  34. 65
  35. 145
  36. 10
  37. 70
  38. 50
  39. 260
  40. 50

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