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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 515 · 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 70° and 120°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  7. 7.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  8. 8.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  9. 9.Two angles of a triangle are 45° and 110°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 35° and 50°. What is the third angle (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.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 35° and 140°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  18. 18.An angle measures 100°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  19. 19.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 40° and 70°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  27. 27.An angle measures 75°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  28. 28.Two angles of a triangle are 30° and 115°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 20° and 55°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  36. 36.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 45° and 85°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  40. 40.An angle measures 55°. What kind of angle is it? (a) Acute (b) Right (c) Straight

Answer key

  1. 170
  2. 25
  3. 95
  4. 165
  5. 120
  6. 150
  7. Acute
  8. Right
  9. 25
  10. 65
  11. 95
  12. 25
  13. 45
  14. 5
  15. 160
  16. 155
  17. 55
  18. Obtuse
  19. 135
  20. 30
  21. 85
  22. 90
  23. 120
  24. 30
  25. 70
  26. 180
  27. Acute
  28. 35
  29. 45
  30. 85
  31. 5
  32. 170
  33. 40
  34. 105
  35. 90
  36. 15
  37. 40
  38. 50
  39. 75
  40. Acute

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