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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 409 · 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 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  2. 2.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  5. 5.An angle measures 75°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  6. 6.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 20° and 120°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 35° and 115°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 25° and 125°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  17. 17.An angle measures 115°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  18. 18.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 30° and 145°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  24. 24.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  25. 25.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  28. 28.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  29. 29.An angle measures 25°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  32. 32.An angle measures 165°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  33. 33.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 50° and 55°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?

Answer key

  1. Straight
  2. 125
  3. 50
  4. 150
  5. Acute
  6. 90
  7. 60
  8. 15
  9. 75
  10. 80
  11. 40
  12. 30
  13. 30
  14. 140
  15. 60
  16. 70
  17. Obtuse
  18. 210
  19. 5
  20. 150
  21. 55
  22. 115
  23. 70
  24. Right
  25. 140
  26. 65
  27. 60
  28. Obtuse
  29. Acute
  30. 120
  31. 30
  32. Obtuse
  33. 220
  34. 75
  35. 165
  36. 35
  37. 45
  38. 160
  39. 50
  40. 70

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