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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 381 · 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.An angle measures 140°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  2. 2.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 30° and 100°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  6. 6.Two angles of a triangle are 30° and 135°. What is the third angle (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.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 25° and 45°. What is the third angle (in degrees)?
  18. 18.An angle measures 40°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  19. 19.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  20. 20.An angle measures 85°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  21. 21.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  23. 23.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  24. 24.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  28. 28.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  29. 29.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  30. 30.An angle measures 100°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  31. 31.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 55° and 30°. What is the third angle (in degrees)?
  39. 39.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  40. 40.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?

Answer key

  1. Obtuse
  2. 30
  3. 50
  4. 80
  5. Straight
  6. 15
  7. 260
  8. 40
  9. 150
  10. 65
  11. 90
  12. 180
  13. 55
  14. 150
  15. 180
  16. 95
  17. 110
  18. Acute
  19. 60
  20. Acute
  21. 60
  22. 75
  23. Acute
  24. 70
  25. 65
  26. 180
  27. 75
  28. Right
  29. 80
  30. Obtuse
  31. 150
  32. 85
  33. 35
  34. 120
  35. 145
  36. 150
  37. 90
  38. 95
  39. Obtuse
  40. 50

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