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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 1 · 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 15°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 90° and 60°. What is the third angle (in degrees)?
  5. 5.An angle measures 105°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  6. 6.Two angles together make a straight line. One of them is 50°. 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.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  10. 10.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  16. 16.An angle measures 60°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  17. 17.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  19. 19.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  20. 20.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  21. 21.An angle measures 50°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  22. 22.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  23. 23.An angle measures 30°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  24. 24.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 55° and 35°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 25° and 70°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 30° and 80°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 65° and 20°. What is the third angle (in degrees)?

Answer key

  1. 75
  2. 35
  3. 150
  4. 30
  5. Obtuse
  6. 130
  7. 70
  8. 50
  9. Straight
  10. 30
  11. 30
  12. 180
  13. 170
  14. 135
  15. 60
  16. Acute
  17. 150
  18. 10
  19. Right
  20. 145
  21. Acute
  22. 100
  23. Acute
  24. 5
  25. 220
  26. 85
  27. 80
  28. 150
  29. 90
  30. 130
  31. 85
  32. 180
  33. 110
  34. 180
  35. 140
  36. 20
  37. 70
  38. 120
  39. 100
  40. 95

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