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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 509 · 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 140° and 130°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 65° and 90°. What is the third angle (in degrees)?
  3. 3.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  4. 4.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  11. 11.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  12. 12.Two angles of a triangle are 20° and 125°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  20. 20.An angle measures 100°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  21. 21.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  30. 30.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  31. 31.An angle measures 75°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  32. 32.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  34. 34.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  35. 35.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 45° and 70°. What is the third angle (in degrees)?

Answer key

  1. 90
  2. 25
  3. Acute
  4. 15
  5. 90
  6. 30
  7. 260
  8. 180
  9. 135
  10. Right
  11. 120
  12. 35
  13. 60
  14. 45
  15. 10
  16. 70
  17. 60
  18. 70
  19. 100
  20. Obtuse
  21. 95
  22. 210
  23. 110
  24. 70
  25. 60
  26. 170
  27. 30
  28. 80
  29. 65
  30. Obtuse
  31. Acute
  32. 130
  33. 30
  34. Straight
  35. 30
  36. 145
  37. 60
  38. 130
  39. 55
  40. 65

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