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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 100 · 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 of a triangle are 45° and 130°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  7. 7.An angle measures 65°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  8. 8.An angle measures 130°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  9. 9.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  11. 11.An angle measures 15°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  12. 12.An angle measures 60°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  13. 13.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  14. 14.An angle measures 25°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  15. 15.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  19. 19.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  20. 20.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  24. 24.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  25. 25.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  33. 33.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  34. 34.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  35. 35.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  36. 36.An angle measures 50°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  37. 37.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?

Answer key

  1. 5
  2. 65
  3. 55
  4. 60
  5. 80
  6. 35
  7. Acute
  8. Obtuse
  9. 220
  10. 15
  11. Acute
  12. Acute
  13. 90
  14. Acute
  15. 20
  16. 240
  17. 60
  18. 65
  19. Right
  20. 30
  21. 95
  22. 150
  23. 15
  24. Straight
  25. 140
  26. 140
  27. 110
  28. 120
  29. 90
  30. 210
  31. 30
  32. 60
  33. Obtuse
  34. 40
  35. Obtuse
  36. Acute
  37. 90
  38. 160
  39. 120
  40. 80

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