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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 244 · 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 together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  2. 2.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  3. 3.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 55° and 45°. What is the third angle (in degrees)?
  6. 6.An angle measures 40°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  7. 7.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  9. 9.An angle measures 160°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  10. 10.An angle measures 125°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  11. 11.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  13. 13.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  14. 14.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  17. 17.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  18. 18.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  22. 22.An angle measures 20°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  23. 23.Two angles of a triangle are 30° and 80°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 30° and 125°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  30. 30.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  31. 31.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  34. 34.An angle measures 60°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  35. 35.Two angles of a triangle are 45° and 115°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?

Answer key

  1. 15
  2. Acute
  3. 190
  4. 115
  5. 80
  6. Acute
  7. 210
  8. 90
  9. Obtuse
  10. Obtuse
  11. 125
  12. 40
  13. Right
  14. 30
  15. 165
  16. 170
  17. Straight
  18. 95
  19. 60
  20. 230
  21. 220
  22. Acute
  23. 70
  24. 145
  25. 120
  26. 25
  27. 70
  28. 120
  29. 170
  30. Obtuse
  31. 120
  32. 65
  33. 70
  34. Acute
  35. 20
  36. 220
  37. 120
  38. 50
  39. 60
  40. 140

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