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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 295 · 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.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  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 6 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 25°. What is the other 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.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  7. 7.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  9. 9.An angle measures 115°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  10. 10.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  12. 12.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 25° and 140°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 55° and 70°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 20° and 25°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  35. 35.An angle measures 130°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  36. 36.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  37. 37.An angle measures 65°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  38. 38.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  39. 39.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  40. 40.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?

Answer key

  1. 150
  2. 30
  3. 180
  4. 155
  5. 80
  6. Acute
  7. 25
  8. Right
  9. Obtuse
  10. 120
  11. Straight
  12. 90
  13. 70
  14. 105
  15. 260
  16. 15
  17. 75
  18. 100
  19. 25
  20. 145
  21. 70
  22. 95
  23. 120
  24. 35
  25. 55
  26. 45
  27. 135
  28. 65
  29. 160
  30. 50
  31. 60
  32. 210
  33. 160
  34. 120
  35. Obtuse
  36. 65
  37. Acute
  38. 50
  39. Obtuse
  40. 70

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