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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 681 · 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 20° and 100°. What is the third angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  3. 3.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  5. 5.An angle measures 65°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  18. 18.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  22. 22.An angle measures 75°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  23. 23.Two angles of a triangle are 20° and 40°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  33. 33.An angle measures 165°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  34. 34.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  36. 36.An angle measures 100°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  37. 37.Two angles of a triangle are 35° and 35°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 95° and 45°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  40. 40.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Straight

Answer key

  1. 60
  2. Straight
  3. 110
  4. 15
  5. Acute
  6. 60
  7. 90
  8. 165
  9. 90
  10. 70
  11. 15
  12. 200
  13. 150
  14. 120
  15. 20
  16. 70
  17. Right
  18. 10
  19. 30
  20. 60
  21. 25
  22. Acute
  23. 120
  24. 150
  25. 100
  26. 30
  27. 85
  28. 60
  29. 80
  30. 120
  31. 25
  32. 150
  33. Obtuse
  34. 80
  35. 115
  36. Obtuse
  37. 110
  38. 40
  39. 200
  40. Acute

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