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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 447 · 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 60°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  4. 4.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?
  14. 14.An angle measures 60°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  15. 15.Two angles of a triangle are 50° and 80°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 50° and 100°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 70° and 100°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  28. 28.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  29. 29.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  31. 31.An angle measures 130°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  32. 32.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  35. 35.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  36. 36.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 55° and 90°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?

Answer key

  1. 30
  2. 200
  3. Straight
  4. 90
  5. 70
  6. 60
  7. 75
  8. 10
  9. 180
  10. 150
  11. 90
  12. 70
  13. 70
  14. Acute
  15. 50
  16. 5
  17. 75
  18. 30
  19. 110
  20. 90
  21. 150
  22. 110
  23. 65
  24. 45
  25. 115
  26. 10
  27. 120
  28. Right
  29. 230
  30. 80
  31. Obtuse
  32. 40
  33. 150
  34. 5
  35. Obtuse
  36. 190
  37. 35
  38. 240
  39. 100
  40. 45

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