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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 390 · 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 10°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  2. 2.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 25° and 80°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  7. 7.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  8. 8.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 40° and 125°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  12. 12.Two angles of a triangle are 40° and 120°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  14. 14.An angle measures 20°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  17. 17.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  18. 18.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  22. 22.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  23. 23.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  26. 26.An angle measures 85°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  27. 27.Three angles meet at a point. Two of them are 130° and 80°. What is the third 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.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 20° and 130°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 45°. 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.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?

Answer key

  1. Acute
  2. 210
  3. 180
  4. 150
  5. 75
  6. 180
  7. Acute
  8. 110
  9. 10
  10. 15
  11. 90
  12. 20
  13. 60
  14. Acute
  15. 90
  16. 120
  17. Straight
  18. 125
  19. 220
  20. 35
  21. 35
  22. Right
  23. 105
  24. 80
  25. 85
  26. Acute
  27. 150
  28. 25
  29. 55
  30. 30
  31. 15
  32. 30
  33. 135
  34. 60
  35. 20
  36. 120
  37. 160
  38. 95
  39. 15
  40. 150

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