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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 9 · 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.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  4. 4.An angle measures 40°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  5. 5.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 100° and 90°. What is the third 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.Two angles of a triangle are 30° and 85°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  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 50°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 55° and 110°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 30° and 135°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  26. 26.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  27. 27.An angle measures 165°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  28. 28.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?
  34. 34.An angle measures 155°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  35. 35.A right angle is split into two angles. 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 30°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 85° and 75°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  40. 40.Two angles of a triangle are 30° and 80°. What is the third angle (in degrees)?

Answer key

  1. 30
  2. 70
  3. 90
  4. Acute
  5. 150
  6. 10
  7. 230
  8. 165
  9. 170
  10. 40
  11. 65
  12. 35
  13. 25
  14. 25
  15. 130
  16. 180
  17. 200
  18. 210
  19. 15
  20. 65
  21. 5
  22. 120
  23. 15
  24. 150
  25. 140
  26. Right
  27. Obtuse
  28. 150
  29. 110
  30. 40
  31. 5
  32. 15
  33. 90
  34. Obtuse
  35. 55
  36. 150
  37. 20
  38. 60
  39. 30
  40. 70

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