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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 504 · 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 40°. What is the other angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  3. 3.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  5. 5.Two angles of a triangle are 40° and 40°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  10. 10.An angle measures 135°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  11. 11.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  13. 13.An angle measures 170°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  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 15°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  22. 22.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  23. 23.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  26. 26.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  27. 27.Two angles of a triangle are 20° and 140°. 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.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  31. 31.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  32. 32.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 25°. 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. 50
  2. Straight
  3. 90
  4. 120
  5. 100
  6. 150
  7. 30
  8. 145
  9. 160
  10. Obtuse
  11. 85
  12. 70
  13. Obtuse
  14. 15
  15. 75
  16. 230
  17. 135
  18. 65
  19. 160
  20. 55
  21. 10
  22. Right
  23. 35
  24. 110
  25. 30
  26. Obtuse
  27. 20
  28. 90
  29. 5
  30. 220
  31. Acute
  32. 80
  33. 60
  34. 70
  35. 50
  36. 90
  37. 60
  38. 30
  39. 65
  40. 60

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