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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 956 · 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 75° and 45°. What is the third angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  3. 3.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  6. 6.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  7. 7.An angle measures 95°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  8. 8.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 25° and 105°. What is the third angle (in degrees)?
  10. 10.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  11. 11.Two angles of a triangle are 25° and 125°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 60° and 45°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  18. 18.An angle measures 30°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  19. 19.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 45° and 50°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  26. 26.An angle measures 70°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  27. 27.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 30° and 25°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 55° and 75°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  37. 37.An angle measures 45°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  38. 38.Two angles of a triangle are 45° and 30°. What is the third angle (in degrees)?
  39. 39.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  40. 40.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?

Answer key

  1. 60
  2. Straight
  3. 60
  4. 110
  5. 90
  6. Obtuse
  7. Obtuse
  8. 30
  9. 50
  10. Obtuse
  11. 30
  12. 40
  13. 30
  14. 55
  15. 75
  16. 150
  17. 85
  18. Acute
  19. 10
  20. 60
  21. 85
  22. 15
  23. 70
  24. 170
  25. 170
  26. Acute
  27. 70
  28. 85
  29. 60
  30. 25
  31. 150
  32. 125
  33. 60
  34. 230
  35. 50
  36. 105
  37. Acute
  38. 105
  39. Right
  40. 120

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