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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 918 · 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.A right angle is split into two angles. One of them is 30°. What is the other 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 90°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 35° and 95°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  12. 12.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  13. 13.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  14. 14.An angle measures 35°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  15. 15.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  16. 16.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  20. 20.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  21. 21.An angle measures 150°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  22. 22.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 20° and 120°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  31. 31.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  32. 32.Two angles of a triangle are 45° and 30°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?

Answer key

  1. 60
  2. 65
  3. 5
  4. 110
  5. 50
  6. 165
  7. 230
  8. 25
  9. 150
  10. 35
  11. 60
  12. Right
  13. 55
  14. Acute
  15. Obtuse
  16. 70
  17. 170
  18. 70
  19. 60
  20. Straight
  21. Obtuse
  22. 120
  23. 85
  24. 210
  25. 190
  26. 30
  27. 25
  28. 40
  29. 100
  30. 160
  31. Acute
  32. 105
  33. 5
  34. 30
  35. 75
  36. 45
  37. 180
  38. 150
  39. 220
  40. 105

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