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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 161 · 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 45° and 130°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 30° and 105°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  13. 13.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  14. 14.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  18. 18.An angle measures 95°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  19. 19.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  22. 22.An angle measures 75°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  23. 23.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  31. 31.An angle measures 150°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  32. 32.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 65° and 85°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  38. 38.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  39. 39.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  40. 40.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute

Answer key

  1. 5
  2. 10
  3. 200
  4. 45
  5. 70
  6. 85
  7. 45
  8. 120
  9. 120
  10. 170
  11. 110
  12. 150
  13. Right
  14. 90
  15. 60
  16. 35
  17. 15
  18. Obtuse
  19. 140
  20. 30
  21. 100
  22. Acute
  23. 140
  24. 155
  25. 150
  26. 30
  27. 75
  28. 30
  29. 160
  30. 60
  31. Obtuse
  32. 130
  33. 30
  34. 150
  35. 120
  36. 105
  37. 30
  38. Obtuse
  39. 45
  40. Obtuse

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