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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 55 · 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 45°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  2. 2.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  7. 7.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  9. 9.An angle measures 170°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  10. 10.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  11. 11.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  12. 12.Two angles of a triangle are 45° and 120°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  17. 17.Two angles of a triangle are 60° and 50°. What is the third angle (in degrees)?
  18. 18.An angle measures 60°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  19. 19.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 45° and 50°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  23. 23.An angle measures 70°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  24. 24.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 60° and 60°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 35° and 95°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?

Answer key

  1. Acute
  2. 75
  3. 10
  4. 180
  5. 25
  6. Straight
  7. 170
  8. 90
  9. Obtuse
  10. 130
  11. Obtuse
  12. 15
  13. 120
  14. 20
  15. 55
  16. 180
  17. 70
  18. Acute
  19. 80
  20. 220
  21. 85
  22. 95
  23. Acute
  24. 55
  25. 25
  26. 15
  27. 30
  28. 85
  29. 65
  30. 150
  31. 60
  32. 180
  33. 110
  34. 60
  35. 80
  36. 80
  37. 50
  38. 60
  39. 120
  40. 160

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