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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 809 · 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.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  2. 2.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 90° and 75°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  8. 8.Two angles of a triangle are 45° and 65°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  13. 13.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  14. 14.Two angles of a triangle are 80° and 90°. 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.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 25° and 55°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  25. 25.An angle measures 125°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  26. 26.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 50° and 150°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  35. 35.An angle measures 155°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  36. 36.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  37. 37.An angle measures 115°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  38. 38.An angle measures 75°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  39. 39.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 35° and 90°. What is the third angle (in degrees)?

Answer key

  1. Acute
  2. 50
  3. 150
  4. 70
  5. 15
  6. 40
  7. Right
  8. 70
  9. 200
  10. 45
  11. 15
  12. 160
  13. Straight
  14. 10
  15. 20
  16. 30
  17. 10
  18. 40
  19. 30
  20. 55
  21. 100
  22. 70
  23. 30
  24. 75
  25. Obtuse
  26. 180
  27. 30
  28. 95
  29. 120
  30. 150
  31. 160
  32. 60
  33. 60
  34. 60
  35. Obtuse
  36. 135
  37. Obtuse
  38. Acute
  39. 60
  40. 55

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