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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 510 · 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 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  2. 2.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  5. 5.Two angles of a triangle are 90° and 30°. What is the third 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.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 30° and 105°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 25° and 115°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 55° and 100°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  30. 30.An angle measures 135°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  31. 31.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 70° and 75°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  34. 34.An angle measures 175°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  35. 35.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  36. 36.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?

Answer key

  1. Right
  2. 30
  3. 30
  4. Straight
  5. 60
  6. 75
  7. 180
  8. 45
  9. 120
  10. 150
  11. 5
  12. 25
  13. 60
  14. 40
  15. 30
  16. 90
  17. 240
  18. 25
  19. 140
  20. 70
  21. 15
  22. 40
  23. 20
  24. 120
  25. 65
  26. 35
  27. 85
  28. 140
  29. 60
  30. Obtuse
  31. 65
  32. 35
  33. 45
  34. Obtuse
  35. Obtuse
  36. 70
  37. 140
  38. 160
  39. 90
  40. 20

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