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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 112 · 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 65°. What is the other angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  3. 3.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 35° and 125°. What is the third angle (in degrees)?
  8. 8.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  9. 9.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  10. 10.An angle measures 95°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  11. 11.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 40° and 85°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  23. 23.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  24. 24.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  25. 25.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  26. 26.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  27. 27.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  28. 28.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  30. 30.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  31. 31.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?

Answer key

  1. 25
  2. Right
  3. 30
  4. 35
  5. 160
  6. 60
  7. 20
  8. Acute
  9. 100
  10. Obtuse
  11. 35
  12. 65
  13. 60
  14. 70
  15. 120
  16. 90
  17. 180
  18. 35
  19. 80
  20. 150
  21. 55
  22. 150
  23. Straight
  24. 75
  25. Acute
  26. 40
  27. Acute
  28. 105
  29. 90
  30. Obtuse
  31. 120
  32. 150
  33. 90
  34. 200
  35. 210
  36. 165
  37. 90
  38. 10
  39. 160
  40. 190

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