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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 436 · 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 80° and 55°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  6. 6.An angle measures 115°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  7. 7.Two angles of a triangle are 20° and 150°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  10. 10.An angle measures 155°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  11. 11.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  21. 21.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  22. 22.Two angles of a triangle are 80° and 45°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  28. 28.An angle measures 150°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  29. 29.Two angles of a triangle are 30° and 110°. What is the third angle (in degrees)?
  30. 30.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  31. 31.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  36. 36.An angle measures 175°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  37. 37.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 20° and 90°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?

Answer key

  1. 45
  2. 60
  3. 90
  4. 55
  5. 55
  6. Obtuse
  7. 10
  8. 70
  9. 30
  10. Obtuse
  11. 90
  12. 65
  13. 145
  14. 115
  15. 140
  16. 10
  17. 170
  18. 120
  19. 65
  20. 60
  21. Right
  22. 55
  23. 25
  24. 150
  25. 150
  26. 25
  27. 50
  28. Obtuse
  29. 40
  30. Straight
  31. 135
  32. 35
  33. 95
  34. 95
  35. 120
  36. Obtuse
  37. 190
  38. 120
  39. 70
  40. 110

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