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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 740 · 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 155°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  2. 2.Two angles of a triangle are 65° and 75°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  11. 11.Two angles of a triangle are 20° and 45°. 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.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 60° and 105°. What is the third angle (in degrees)?
  15. 15.An angle measures 75°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  16. 16.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?
  19. 19.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  20. 20.Two angles of a triangle are 60° and 85°. What is the third angle (in degrees)?
  21. 21.An angle measures 10°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  22. 22.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 25° and 90°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  26. 26.An angle measures 30°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  27. 27.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  31. 31.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  32. 32.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  34. 34.An angle measures 135°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  35. 35.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 20° and 50°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 40
  3. 150
  4. 25
  5. 40
  6. 180
  7. 140
  8. 140
  9. 55
  10. Straight
  11. 115
  12. 90
  13. 90
  14. 15
  15. Acute
  16. 15
  17. 55
  18. 60
  19. Acute
  20. 35
  21. Acute
  22. 80
  23. 65
  24. 180
  25. 135
  26. Acute
  27. 120
  28. 35
  29. 30
  30. 100
  31. Right
  32. 10
  33. 115
  34. Obtuse
  35. 70
  36. 140
  37. 110
  38. 10
  39. 65
  40. 90

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