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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 927 · 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.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 50° and 60°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  6. 6.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  9. 9.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 25° and 55°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 35° and 35°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 35° and 45°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  25. 25.An angle measures 135°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  26. 26.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  27. 27.An angle measures 170°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  28. 28.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  32. 32.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  33. 33.Two angles of a triangle are 65° and 95°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 50° and 50°. What is the third angle (in degrees)?

Answer key

  1. 120
  2. 110
  3. 70
  4. 30
  5. Acute
  6. 240
  7. 170
  8. Right
  9. 60
  10. 100
  11. 80
  12. 90
  13. 5
  14. 70
  15. 110
  16. 145
  17. 50
  18. 10
  19. 80
  20. 100
  21. 45
  22. 35
  23. 60
  24. 70
  25. Obtuse
  26. 10
  27. Obtuse
  28. 30
  29. 140
  30. 120
  31. 140
  32. Straight
  33. 20
  34. 180
  35. 135
  36. 5
  37. 165
  38. 60
  39. 100
  40. 80

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