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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 6 · 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 45°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  6. 6.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  9. 9.Two angles of a triangle are 40° and 95°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  12. 12.An angle measures 15°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  13. 13.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  14. 14.An angle measures 20°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  15. 15.Two angles of a triangle are 35° and 35°. What is the third angle (in degrees)?
  16. 16.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  17. 17.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  28. 28.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  29. 29.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  37. 37.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  38. 38.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  39. 39.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  40. 40.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?

Answer key

  1. 135
  2. 90
  3. 100
  4. 105
  5. Straight
  6. 190
  7. 60
  8. 90
  9. 45
  10. 100
  11. 50
  12. Acute
  13. 120
  14. Acute
  15. 110
  16. Obtuse
  17. 5
  18. 140
  19. 35
  20. 55
  21. 70
  22. 150
  23. 150
  24. 70
  25. 30
  26. 20
  27. 160
  28. Acute
  29. 40
  30. 60
  31. 15
  32. 65
  33. 85
  34. 170
  35. 60
  36. 60
  37. Acute
  38. 180
  39. Right
  40. 180

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