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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 417 · 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 together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 55° and 90°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  12. 12.An angle measures 50°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  13. 13.What is the smaller angle between the hands of a clock at 7 o'clock (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.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  17. 17.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  18. 18.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 75° and 80°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  22. 22.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  23. 23.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. 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 60°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?
  27. 27.An angle measures 15°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  28. 28.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  35. 35.An angle measures 85°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  36. 36.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  37. 37.An angle measures 165°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  38. 38.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  39. 39.An angle measures 110°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  40. 40.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?

Answer key

  1. 160
  2. 90
  3. 35
  4. 55
  5. 30
  6. 75
  7. 40
  8. 75
  9. 60
  10. 165
  11. Right
  12. Acute
  13. 150
  14. 95
  15. 90
  16. 20
  17. Straight
  18. 120
  19. 25
  20. 60
  21. 120
  22. Acute
  23. 110
  24. 135
  25. 120
  26. 70
  27. Acute
  28. 50
  29. 180
  30. 240
  31. 100
  32. 190
  33. 65
  34. 130
  35. Acute
  36. 105
  37. Obtuse
  38. 180
  39. Obtuse
  40. 45

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