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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 311 · 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 1 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 35° and 125°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  5. 5.An angle measures 115°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  6. 6.Two angles of a triangle are 65° and 25°. What is the third angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  8. 8.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  11. 11.An angle measures 15°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  12. 12.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  13. 13.An angle measures 55°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  14. 14.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 65°. 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 6 o'clock (in degrees)?
  18. 18.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  19. 19.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  21. 21.An angle measures 175°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  22. 22.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  24. 24.An angle measures 80°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  25. 25.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  29. 29.An angle measures 105°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  30. 30.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  32. 32.An angle measures 125°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  33. 33.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  34. 34.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 45° and 90°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 80° and 60°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  40. 40.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight

Answer key

  1. 30
  2. 20
  3. 60
  4. 70
  5. Obtuse
  6. 90
  7. Straight
  8. 150
  9. 200
  10. 60
  11. Acute
  12. 125
  13. Acute
  14. 60
  15. 25
  16. 150
  17. 180
  18. Acute
  19. 75
  20. 115
  21. Obtuse
  22. 230
  23. 90
  24. Acute
  25. 170
  26. 40
  27. 55
  28. 35
  29. Obtuse
  30. 150
  31. 120
  32. Obtuse
  33. Obtuse
  34. 30
  35. 45
  36. 40
  37. 85
  38. 105
  39. 55
  40. Right

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