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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 133 · 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 of a triangle are 35° and 120°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  5. 5.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  8. 8.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 55° and 115°. What is the third angle (in degrees)?
  16. 16.An angle measures 125°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  17. 17.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  18. 18.An angle measures 140°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  19. 19.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 45° and 20°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  35. 35.An angle measures 15°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  36. 36.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?

Answer key

  1. 25
  2. 100
  3. 115
  4. Right
  5. 90
  6. 120
  7. Straight
  8. 60
  9. 85
  10. 130
  11. 170
  12. 30
  13. 40
  14. 130
  15. 10
  16. Obtuse
  17. 5
  18. Obtuse
  19. 160
  20. 125
  21. 20
  22. 65
  23. 135
  24. 20
  25. 80
  26. 110
  27. 10
  28. 100
  29. 140
  30. 180
  31. 115
  32. 70
  33. 90
  34. 120
  35. Acute
  36. 90
  37. 70
  38. 170
  39. 95
  40. 50

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