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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 656 · 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 95° and 55°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 55° and 120°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  12. 12.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  15. 15.An angle measures 150°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  16. 16.Two angles of a triangle are 50° and 50°. What is the third angle (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  18. 18.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 75° and 100°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  21. 21.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  22. 22.An angle measures 85°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  23. 23.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 30° and 145°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?

Answer key

  1. 30
  2. 5
  3. 90
  4. 85
  5. 15
  6. 100
  7. 5
  8. 110
  9. 60
  10. 40
  11. Straight
  12. 230
  13. 20
  14. 70
  15. Obtuse
  16. 80
  17. Right
  18. 75
  19. 5
  20. 170
  21. Acute
  22. Acute
  23. 65
  24. 110
  25. 160
  26. 140
  27. 120
  28. 140
  29. 45
  30. 5
  31. 135
  32. 60
  33. 180
  34. 165
  35. 50
  36. 30
  37. 100
  38. 30
  39. 45
  40. 35

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