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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 623 · 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 85°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  8. 8.An angle measures 110°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  9. 9.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  13. 13.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  14. 14.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  15. 15.An angle measures 30°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  16. 16.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  18. 18.An angle measures 135°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  19. 19.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  22. 22.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  24. 24.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  25. 25.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 20° and 40°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 60° and 60°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 50° and 95°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 20° and 140°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?

Answer key

  1. 5
  2. 150
  3. 15
  4. 45
  5. 75
  6. 110
  7. 150
  8. Obtuse
  9. 120
  10. 90
  11. 85
  12. 160
  13. Straight
  14. Right
  15. Acute
  16. 80
  17. 100
  18. Obtuse
  19. 230
  20. 140
  21. 60
  22. 75
  23. 20
  24. Acute
  25. 170
  26. 30
  27. 90
  28. 120
  29. 25
  30. 60
  31. 35
  32. 55
  33. 20
  34. 80
  35. 35
  36. 40
  37. 30
  38. 120
  39. 70
  40. 15

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