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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 780 · 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 45°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 8 o'clock (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.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  7. 7.What is the smaller angle between the hands of a clock at 3 o'clock (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.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  12. 12.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 75° and 35°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  23. 23.An angle measures 20°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  24. 24.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (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.An angle measures 25°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  31. 31.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 30° and 65°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 50° and 20°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?

Answer key

  1. 45
  2. 40
  3. 100
  4. 120
  5. 75
  6. Right
  7. 90
  8. 165
  9. 30
  10. 55
  11. Straight
  12. 65
  13. 10
  14. 20
  15. 150
  16. 180
  17. 170
  18. 50
  19. 70
  20. 35
  21. 30
  22. 95
  23. Acute
  24. 80
  25. 80
  26. 140
  27. 105
  28. 60
  29. 110
  30. Acute
  31. 150
  32. 80
  33. 105
  34. 60
  35. 100
  36. 85
  37. 110
  38. 45
  39. 170
  40. 110

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