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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 14 · 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 35°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  4. 4.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  5. 5.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 75° and 45°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 20° and 100°. What is the third angle (in degrees)?
  20. 20.An angle measures 10°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  21. 21.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 35° and 115°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  28. 28.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  29. 29.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 45° and 20°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?

Answer key

  1. 55
  2. 65
  3. Straight
  4. Right
  5. 150
  6. 90
  7. 110
  8. 30
  9. 20
  10. 70
  11. 110
  12. 60
  13. 160
  14. 130
  15. 180
  16. 80
  17. 45
  18. 10
  19. 60
  20. Acute
  21. 75
  22. 30
  23. 85
  24. 40
  25. 50
  26. 30
  27. 120
  28. Obtuse
  29. 80
  30. 115
  31. 120
  32. 15
  33. 85
  34. 35
  35. 140
  36. 170
  37. 50
  38. 40
  39. 25
  40. 140

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