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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 522 · 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 40°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  3. 3.An angle measures 95°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  4. 4.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 70° and 105°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  12. 12.Two angles of a triangle are 20° and 40°. What is the third angle (in degrees)?
  13. 13.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  14. 14.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  17. 17.An angle measures 110°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  18. 18.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  26. 26.An angle measures 130°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  27. 27.Two angles of a triangle are 60° and 110°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  33. 33.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  35. 35.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  36. 36.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?

Answer key

  1. 140
  2. 90
  3. Obtuse
  4. 150
  5. 95
  6. 125
  7. 165
  8. 5
  9. 5
  10. 150
  11. Right
  12. 120
  13. Straight
  14. 80
  15. 180
  16. 40
  17. Obtuse
  18. 60
  19. 190
  20. 80
  21. 170
  22. 110
  23. 90
  24. 100
  25. 30
  26. Obtuse
  27. 10
  28. 160
  29. 10
  30. 10
  31. 120
  32. 30
  33. 40
  34. 40
  35. Acute
  36. 75
  37. 130
  38. 200
  39. 50
  40. 45

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