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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 104 · 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 60°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  4. 4.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 75° and 45°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  9. 9.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  10. 10.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  14. 14.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  15. 15.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 50° and 65°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 50° and 120°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  27. 27.An angle measures 25°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  28. 28.Two angles of a triangle are 55° and 35°. 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.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  32. 32.An angle measures 45°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  33. 33.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  37. 37.An angle measures 65°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  38. 38.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  39. 39.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?

Answer key

  1. 120
  2. 70
  3. Right
  4. 20
  5. 80
  6. 220
  7. 60
  8. 120
  9. Acute
  10. 60
  11. 15
  12. 210
  13. 60
  14. Straight
  15. 145
  16. 65
  17. 105
  18. 10
  19. 130
  20. 20
  21. 65
  22. 230
  23. 40
  24. 170
  25. 45
  26. 60
  27. Acute
  28. 90
  29. 120
  30. 25
  31. 70
  32. Acute
  33. 85
  34. 110
  35. 5
  36. 40
  37. Acute
  38. Acute
  39. 100
  40. 100

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