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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 243 · 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.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  6. 6.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  7. 7.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  8. 8.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 50° and 50°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 40° and 70°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  21. 21.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  22. 22.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  36. 36.An angle measures 15°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  37. 37.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  38. 38.An angle measures 110°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  39. 39.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?

Answer key

  1. 135
  2. 45
  3. 40
  4. 60
  5. 200
  6. Acute
  7. Straight
  8. 100
  9. 10
  10. 90
  11. 80
  12. 130
  13. 160
  14. 15
  15. 70
  16. 240
  17. 5
  18. 55
  19. 70
  20. 100
  21. Right
  22. 35
  23. 80
  24. 130
  25. 55
  26. 130
  27. 120
  28. 110
  29. 25
  30. 75
  31. 210
  32. 60
  33. 210
  34. 150
  35. 180
  36. Acute
  37. 90
  38. Obtuse
  39. 40
  40. 60

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