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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 475 · 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.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  2. 2.An angle measures 65°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  3. 3.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  7. 7.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 50° and 60°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  12. 12.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  13. 13.An angle measures 50°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  14. 14.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  18. 18.An angle measures 75°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  19. 19.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  23. 23.Two angles of a triangle are 80° and 25°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  26. 26.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  27. 27.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 40° and 70°. What is the third angle (in degrees)?
  29. 29.An angle measures 60°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  30. 30.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 35° and 45°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  35. 35.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  36. 36.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  39. 39.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  40. 40.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?

Answer key

  1. 60
  2. Acute
  3. 75
  4. 30
  5. 45
  6. Straight
  7. 60
  8. 110
  9. 70
  10. 20
  11. 60
  12. Obtuse
  13. Acute
  14. 135
  15. 110
  16. 165
  17. 140
  18. Acute
  19. 85
  20. 210
  21. 190
  22. 30
  23. 75
  24. 120
  25. 50
  26. Right
  27. 60
  28. 70
  29. Acute
  30. 30
  31. 60
  32. 65
  33. 100
  34. 100
  35. Obtuse
  36. 105
  37. 180
  38. 40
  39. Obtuse
  40. 200

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