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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 455 · 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.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  4. 4.An angle measures 105°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  5. 5.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  10. 10.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  11. 11.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  12. 12.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 60° and 40°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 60° and 110°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  17. 17.An angle measures 140°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  18. 18.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 145°. What is the other angle (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 65°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  29. 29.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  30. 30.An angle measures 115°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  31. 31.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 25° and 130°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?

Answer key

  1. 15
  2. 60
  3. 100
  4. Obtuse
  5. 30
  6. 135
  7. 70
  8. 115
  9. Straight
  10. 90
  11. Obtuse
  12. 80
  13. 75
  14. 80
  15. 10
  16. 130
  17. Obtuse
  18. 125
  19. 60
  20. 80
  21. 50
  22. 20
  23. 85
  24. 35
  25. 65
  26. 25
  27. 50
  28. 120
  29. Right
  30. Obtuse
  31. 65
  32. 105
  33. 10
  34. 70
  35. 60
  36. 25
  37. 155
  38. 145
  39. 100
  40. 100

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