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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 704 · 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.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 50° and 85°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  11. 11.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  13. 13.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  14. 14.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 45° and 35°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  28. 28.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  29. 29.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  38. 38.An angle measures 25°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  39. 39.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?

Answer key

  1. 40
  2. 50
  3. 85
  4. 90
  5. 35
  6. 75
  7. 45
  8. 55
  9. 85
  10. Right
  11. 135
  12. 60
  13. Straight
  14. 15
  15. 90
  16. 30
  17. 100
  18. 145
  19. 180
  20. 85
  21. 90
  22. 40
  23. 180
  24. 155
  25. 70
  26. 70
  27. 140
  28. Obtuse
  29. 15
  30. 90
  31. 30
  32. 220
  33. 150
  34. 50
  35. 190
  36. 50
  37. 25
  38. Acute
  39. 110
  40. 80

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