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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 154 · 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 100° and 65°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  5. 5.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  12. 12.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  13. 13.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  14. 14.An angle measures 170°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  15. 15.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  20. 20.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  25. 25.An angle measures 30°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  26. 26.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  33. 33.An angle measures 15°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  34. 34.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 95° and 65°. 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.An angle measures 145°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  38. 38.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 30° and 85°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?

Answer key

  1. 15
  2. 115
  3. 60
  4. Right
  5. 25
  6. 75
  7. 200
  8. 30
  9. 90
  10. 250
  11. 170
  12. Obtuse
  13. 60
  14. Obtuse
  15. 35
  16. 150
  17. 120
  18. 120
  19. Straight
  20. 95
  21. 55
  22. 230
  23. 170
  24. 80
  25. Acute
  26. 85
  27. 125
  28. 180
  29. 50
  30. 110
  31. 150
  32. 10
  33. Acute
  34. 260
  35. 20
  36. 60
  37. Obtuse
  38. 15
  39. 65
  40. 80

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