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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 8 · 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) Straight (c) Acute
  2. 2.Two angles of a triangle are 60° and 60°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  5. 5.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 55° and 35°. What is the third angle (in degrees)?
  9. 9.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  10. 10.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  13. 13.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  14. 14.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 60° and 65°. What is the third angle (in degrees)?
  18. 18.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  19. 19.An angle measures 175°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  20. 20.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 9 o'clock (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 100° and 40°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 60° and 25°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  33. 33.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  34. 34.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?

Answer key

  1. Acute
  2. 60
  3. 110
  4. Right
  5. 30
  6. 65
  7. 30
  8. 90
  9. Obtuse
  10. 85
  11. 90
  12. 25
  13. Straight
  14. 120
  15. 165
  16. 15
  17. 55
  18. Obtuse
  19. Obtuse
  20. 70
  21. 210
  22. 155
  23. 150
  24. 90
  25. 125
  26. 40
  27. 210
  28. 95
  29. 230
  30. 60
  31. 240
  32. 105
  33. Acute
  34. 135
  35. 50
  36. 180
  37. 40
  38. 45
  39. 55
  40. 150

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