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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 169 · 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 40° and 25°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  3. 3.An angle measures 100°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  4. 4.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  5. 5.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  11. 11.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  12. 12.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 70° and 50°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  17. 17.An angle measures 40°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  18. 18.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  30. 30.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  31. 31.A right angle is split into two angles. One of them is 65°. What is the other 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 95° and 45°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  36. 36.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  37. 37.An angle measures 15°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  38. 38.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?

Answer key

  1. 115
  2. 130
  3. Obtuse
  4. Right
  5. 45
  6. 40
  7. 110
  8. 30
  9. 100
  10. 150
  11. Acute
  12. 45
  13. 60
  14. 95
  15. 10
  16. 70
  17. Acute
  18. 60
  19. 75
  20. 90
  21. 180
  22. 110
  23. 120
  24. 60
  25. 120
  26. 160
  27. 70
  28. 75
  29. 150
  30. Straight
  31. 25
  32. 65
  33. 40
  34. 85
  35. 60
  36. 70
  37. Acute
  38. 55
  39. 60
  40. 70

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