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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 240 · 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 75° and 75°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  6. 6.An angle measures 80°. 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 70°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  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 65°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  15. 15.An angle measures 100°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  16. 16.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  19. 19.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  20. 20.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 25° and 75°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  27. 27.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  28. 28.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  31. 31.An angle measures 95°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  32. 32.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 2 o'clock (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.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  39. 39.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  40. 40.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?

Answer key

  1. 30
  2. 45
  3. 60
  4. 30
  5. 120
  6. Acute
  7. 20
  8. 60
  9. 75
  10. 120
  11. 90
  12. 90
  13. 25
  14. 45
  15. Obtuse
  16. 200
  17. 85
  18. 50
  19. Right
  20. 55
  21. 180
  22. 80
  23. 150
  24. 10
  25. 100
  26. 130
  27. Acute
  28. 120
  29. 65
  30. 140
  31. Obtuse
  32. 155
  33. 60
  34. 120
  35. 90
  36. 140
  37. 140
  38. 75
  39. Straight
  40. 125

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