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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 188 · 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 115°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  6. 6.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 130°. 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 10°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  11. 11.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  16. 16.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  17. 17.An angle measures 120°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  18. 18.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 50° and 55°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  22. 22.An angle measures 160°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  23. 23.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  33. 33.An angle measures 135°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  34. 34.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  38. 38.An angle measures 145°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  39. 39.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  40. 40.An angle measures 165°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse

Answer key

  1. 65
  2. 75
  3. 25
  4. 95
  5. Right
  6. 210
  7. 160
  8. 50
  9. 60
  10. Acute
  11. 110
  12. 15
  13. 70
  14. 75
  15. Straight
  16. 140
  17. Obtuse
  18. 120
  19. 75
  20. 140
  21. 150
  22. Obtuse
  23. 20
  24. 60
  25. 10
  26. 180
  27. 170
  28. 150
  29. 180
  30. 60
  31. 70
  32. 210
  33. Obtuse
  34. 165
  35. 140
  36. 45
  37. 90
  38. Obtuse
  39. 130
  40. Obtuse

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