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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 196 · 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.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  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 40°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 20° and 125°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 80° and 60°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  10. 10.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  15. 15.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  18. 18.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  19. 19.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  26. 26.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  27. 27.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  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 together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  35. 35.An angle measures 85°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  36. 36.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 70° and 60°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. 150
  3. 50
  4. 35
  5. 40
  6. 40
  7. 50
  8. 30
  9. Straight
  10. 65
  11. 50
  12. 130
  13. 100
  14. 90
  15. 70
  16. 15
  17. 200
  18. Acute
  19. 40
  20. 90
  21. 10
  22. 150
  23. 140
  24. 120
  25. 220
  26. Obtuse
  27. 145
  28. 75
  29. 135
  30. 120
  31. 120
  32. 160
  33. 165
  34. 80
  35. Acute
  36. 15
  37. 50
  38. 80
  39. 25
  40. 110

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