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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 393 · 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 105°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  2. 2.Two angles of a triangle are 45° and 55°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 50° and 50°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  11. 11.An angle measures 40°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  12. 12.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  13. 13.Two angles of a triangle are 35° and 80°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 45° and 85°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 65° and 100°. What is the third angle (in degrees)?
  19. 19.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  20. 20.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 35° and 125°. What is the third angle (in degrees)?
  24. 24.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  25. 25.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 30° and 55°. What is the third angle (in degrees)?
  30. 30.An angle measures 55°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  31. 31.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 70° and 55°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  37. 37.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  38. 38.An angle measures 80°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  39. 39.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  40. 40.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right

Answer key

  1. Obtuse
  2. 80
  3. 220
  4. 150
  5. 180
  6. 30
  7. 80
  8. 30
  9. 50
  10. 150
  11. Acute
  12. Right
  13. 65
  14. 130
  15. 95
  16. 35
  17. 50
  18. 15
  19. Obtuse
  20. 150
  21. 65
  22. 5
  23. 20
  24. Acute
  25. 30
  26. 25
  27. 65
  28. 150
  29. 95
  30. Acute
  31. 140
  32. 75
  33. 120
  34. 55
  35. 90
  36. 5
  37. Straight
  38. Acute
  39. 40
  40. Acute

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