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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 190 · 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 160°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  3. 3.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  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 100° and 70°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  8. 8.An angle measures 80°. 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 135°. What is the other angle (in degrees)?
  10. 10.An angle measures 160°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  11. 11.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  17. 17.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  18. 18.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  19. 19.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  23. 23.An angle measures 120°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  24. 24.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  27. 27.An angle measures 145°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  28. 28.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?

Answer key

  1. 20
  2. 250
  3. Obtuse
  4. 160
  5. 10
  6. 90
  7. 210
  8. Acute
  9. 45
  10. Obtuse
  11. 180
  12. 180
  13. 5
  14. 170
  15. 30
  16. 150
  17. Straight
  18. Right
  19. 180
  20. 60
  21. 75
  22. 75
  23. Obtuse
  24. 30
  25. 15
  26. 120
  27. Obtuse
  28. 75
  29. 75
  30. 240
  31. 145
  32. 65
  33. 140
  34. 150
  35. 80
  36. 105
  37. 120
  38. 60
  39. 35
  40. 50

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