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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 303 · 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.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 35° and 60°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  12. 12.An angle measures 140°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  13. 13.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  14. 14.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  15. 15.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 35° and 35°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  22. 22.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  23. 23.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 20° and 45°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 55° and 110°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  29. 29.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  30. 30.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 65° and 70°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 60° and 220°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 80° and 45°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 75° and 90°. What is the third angle (in degrees)?

Answer key

  1. 120
  2. 100
  3. 65
  4. 25
  5. 85
  6. 160
  7. 85
  8. 90
  9. 190
  10. 40
  11. 100
  12. Obtuse
  13. Acute
  14. Right
  15. 150
  16. 120
  17. 15
  18. 30
  19. 110
  20. 75
  21. 80
  22. Acute
  23. 190
  24. 115
  25. 5
  26. 15
  27. 155
  28. 60
  29. Straight
  30. 75
  31. 210
  32. 170
  33. 170
  34. 45
  35. 80
  36. 60
  37. 55
  38. 25
  39. 35
  40. 15

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