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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 755 · 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 5°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  6. 6.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  7. 7.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  10. 10.An angle measures 165°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  11. 11.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  12. 12.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 75° and 60°. What is the third angle (in degrees)?
  20. 20.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  21. 21.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 100° and 65°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  36. 36.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  37. 37.Two angles of a triangle are 95° and 55°. 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.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?

Answer key

  1. 85
  2. 80
  3. 140
  4. 20
  5. 140
  6. Obtuse
  7. 50
  8. 55
  9. 60
  10. Obtuse
  11. Straight
  12. 150
  13. 30
  14. 120
  15. 25
  16. 30
  17. 70
  18. 25
  19. 45
  20. Right
  21. 30
  22. 100
  23. 190
  24. 20
  25. 120
  26. 70
  27. 50
  28. 95
  29. 15
  30. 5
  31. 90
  32. 85
  33. 35
  34. 25
  35. 190
  36. Obtuse
  37. 30
  38. 45
  39. 135
  40. 95

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