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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 228 · 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 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  2. 2.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  4. 4.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  5. 5.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  6. 6.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  7. 7.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  8. 8.Two angles of a triangle are 20° and 65°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 90° and 75°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  20. 20.An angle measures 40°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  21. 21.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  39. 39.An angle measures 55°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  40. 40.An angle measures 20°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute

Answer key

  1. Straight
  2. 30
  3. 150
  4. Obtuse
  5. 120
  6. Acute
  7. Right
  8. 95
  9. 100
  10. 140
  11. 60
  12. 180
  13. 60
  14. 210
  15. 80
  16. 15
  17. 40
  18. 210
  19. 30
  20. Acute
  21. 65
  22. 80
  23. 105
  24. 60
  25. 125
  26. 35
  27. 55
  28. 150
  29. 5
  30. 85
  31. 35
  32. 20
  33. 135
  34. 160
  35. 220
  36. 170
  37. 70
  38. 65
  39. Acute
  40. Acute

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