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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 439 · 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 35°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 80° and 220°. What is the third 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.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 25° and 115°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  10. 10.Two angles of a triangle are 35° and 45°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  13. 13.An angle measures 100°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  14. 14.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  15. 15.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 80° and 45°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  22. 22.An angle measures 15°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  23. 23.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 20° and 25°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 35° and 125°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  32. 32.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  33. 33.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  37. 37.An angle measures 95°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  38. 38.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?

Answer key

  1. 55
  2. 20
  3. 60
  4. 165
  5. 240
  6. 150
  7. 40
  8. 90
  9. 60
  10. 100
  11. 70
  12. 190
  13. Obtuse
  14. Acute
  15. 40
  16. 160
  17. 90
  18. 150
  19. 15
  20. 55
  21. 40
  22. Acute
  23. 65
  24. 30
  25. 230
  26. 135
  27. 5
  28. 50
  29. 60
  30. 20
  31. 45
  32. Right
  33. 120
  34. 120
  35. 180
  36. 180
  37. Obtuse
  38. 60
  39. 80
  40. 90

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