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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 268 · 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 145°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  13. 13.Two angles of a triangle are 20° and 110°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  15. 15.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  16. 16.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 75° and 60°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  26. 26.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  27. 27.Two angles of a triangle are 30° and 85°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  30. 30.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  31. 31.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  32. 32.Two angles of a triangle are 65° and 45°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 50° and 85°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  38. 38.An angle measures 80°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  39. 39.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?

Answer key

  1. 35
  2. 20
  3. 180
  4. 75
  5. 70
  6. 120
  7. 140
  8. 150
  9. 230
  10. 20
  11. 60
  12. 150
  13. 50
  14. 75
  15. Right
  16. 150
  17. 60
  18. 30
  19. 45
  20. 45
  21. 30
  22. 130
  23. 140
  24. 55
  25. 120
  26. Obtuse
  27. 65
  28. 90
  29. 10
  30. Straight
  31. Obtuse
  32. 70
  33. 15
  34. 165
  35. 45
  36. 15
  37. 100
  38. Acute
  39. 70
  40. 55

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