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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 950 · 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 30°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  5. 5.An angle measures 40°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  6. 6.Two angles of a triangle are 20° and 80°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  10. 10.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 85° and 80°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  15. 15.An angle measures 160°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  16. 16.An angle measures 125°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  17. 17.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  20. 20.An angle measures 55°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  21. 21.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  22. 22.An angle measures 60°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  23. 23.Two angles of a triangle are 20° and 95°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  26. 26.An angle measures 95°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  27. 27.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  29. 29.An angle measures 30°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 30° and 130°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?

Answer key

  1. 60
  2. 150
  3. 5
  4. 150
  5. Acute
  6. 80
  7. 90
  8. 45
  9. Straight
  10. 155
  11. 45
  12. 5
  13. 15
  14. 170
  15. Obtuse
  16. Obtuse
  17. 250
  18. 135
  19. 120
  20. Acute
  21. 80
  22. Acute
  23. 65
  24. 45
  25. 190
  26. Obtuse
  27. 65
  28. 25
  29. Acute
  30. 120
  31. 80
  32. 80
  33. 40
  34. 60
  35. 110
  36. 20
  37. 15
  38. 135
  39. 150
  40. 210

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