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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 153 · 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 70° and 190°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  5. 5.An angle measures 75°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  6. 6.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  7. 7.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  12. 12.Two angles of a triangle are 70° and 105°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 70° and 80°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  26. 26.An angle measures 15°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  27. 27.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  32. 32.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  33. 33.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  38. 38.An angle measures 95°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  39. 39.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?

Answer key

  1. 100
  2. 85
  3. 140
  4. 150
  5. Acute
  6. Acute
  7. 120
  8. 120
  9. 80
  10. 160
  11. Straight
  12. 5
  13. 120
  14. 150
  15. 160
  16. 90
  17. 40
  18. 150
  19. 60
  20. 30
  21. 45
  22. 80
  23. 30
  24. 105
  25. 35
  26. Acute
  27. 25
  28. 5
  29. 15
  30. 55
  31. 180
  32. Right
  33. 30
  34. 45
  35. 150
  36. 95
  37. 220
  38. Obtuse
  39. 145
  40. 5

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