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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 614 · 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.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  3. 3.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  10. 10.An angle measures 155°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  12. 12.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 20° and 20°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 65° and 95°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  23. 23.An angle measures 120°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  24. 24.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  25. 25.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  26. 26.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  28. 28.An angle measures 130°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  29. 29.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  30. 30.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  31. 31.Two angles of a triangle are 50° and 20°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  34. 34.An angle measures 30°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  35. 35.Two angles of a triangle are 80° and 25°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 160°. What is the other 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 90° and 70°. What is the third angle (in degrees)?

Answer key

  1. 180
  2. Straight
  3. 140
  4. 160
  5. 155
  6. 25
  7. 180
  8. 100
  9. 5
  10. Obtuse
  11. Acute
  12. 170
  13. 140
  14. 120
  15. 60
  16. 60
  17. 200
  18. 20
  19. 150
  20. 80
  21. 130
  22. 55
  23. Obtuse
  24. 10
  25. Right
  26. 75
  27. 55
  28. Obtuse
  29. 170
  30. Acute
  31. 110
  32. 50
  33. 70
  34. Acute
  35. 75
  36. 130
  37. 210
  38. 20
  39. 25
  40. 200

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