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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 10 · 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 90°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 55° and 30°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  8. 8.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  9. 9.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  11. 11.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 115°. 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.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 80° and 160°. 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.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 9 o'clock (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.An angle measures 150°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  22. 22.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  23. 23.Two angles of a triangle are 30° and 85°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 45° and 80°. What is the third angle (in degrees)?
  26. 26.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  27. 27.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  29. 29.An angle measures 25°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  30. 30.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  34. 34.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  35. 35.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?

Answer key

  1. 90
  2. 95
  3. 220
  4. 70
  5. 60
  6. 55
  7. 140
  8. Acute
  9. 140
  10. Straight
  11. 180
  12. 65
  13. 25
  14. 130
  15. 60
  16. 120
  17. 60
  18. 145
  19. 90
  20. 45
  21. Obtuse
  22. 30
  23. 65
  24. 120
  25. 55
  26. Right
  27. 70
  28. 120
  29. Acute
  30. 20
  31. 150
  32. 100
  33. 230
  34. Acute
  35. 5
  36. 30
  37. 90
  38. 80
  39. 20
  40. 35

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