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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 937 · 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 together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 50°. What is the other angle (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 of a triangle are 20° and 75°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  14. 14.An angle measures 105°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  15. 15.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  18. 18.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  21. 21.An angle measures 45°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  22. 22.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  23. 23.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 90° and 60°. 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.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 35° and 130°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 80° and 60°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  36. 36.An angle measures 95°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  37. 37.Three angles meet at a point. Two of them are 50° and 160°. 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.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  40. 40.An angle measures 170°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse

Answer key

  1. 85
  2. 65
  3. 140
  4. 160
  5. 50
  6. 130
  7. 30
  8. 85
  9. 15
  10. 110
  11. 60
  12. 35
  13. 160
  14. Obtuse
  15. 140
  16. 110
  17. Right
  18. 10
  19. 130
  20. 60
  21. Acute
  22. Straight
  23. 135
  24. 30
  25. 120
  26. 90
  27. 15
  28. 190
  29. 40
  30. 110
  31. 150
  32. 75
  33. 45
  34. 25
  35. 30
  36. Obtuse
  37. 150
  38. 40
  39. 200
  40. Obtuse

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