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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 757 · 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 60° and 105°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  4. 4.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  5. 5.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  7. 7.An angle measures 95°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  10. 10.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  25. 25.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  26. 26.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?

Answer key

  1. 15
  2. 140
  3. 10
  4. Obtuse
  5. 120
  6. 160
  7. Obtuse
  8. 120
  9. Straight
  10. 110
  11. 135
  12. 15
  13. 20
  14. 140
  15. 210
  16. 230
  17. 160
  18. 30
  19. 120
  20. 35
  21. 145
  22. 220
  23. 140
  24. 60
  25. Right
  26. 100
  27. 90
  28. 70
  29. 180
  30. 90
  31. 70
  32. 40
  33. 90
  34. 60
  35. 200
  36. 135
  37. 70
  38. 5
  39. 210
  40. 55

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