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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 242 · 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.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 25° and 125°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 55°. What is the other 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 45°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  17. 17.An angle measures 165°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  18. 18.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  20. 20.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  21. 21.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  23. 23.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  24. 24.An angle measures 80°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  25. 25.An angle measures 45°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  26. 26.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  27. 27.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  28. 28.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  29. 29.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  31. 31.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  32. 32.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?

Answer key

  1. 200
  2. 115
  3. 180
  4. 25
  5. 160
  6. 115
  7. 30
  8. 160
  9. 40
  10. 80
  11. 125
  12. 30
  13. 45
  14. 95
  15. 20
  16. 80
  17. Obtuse
  18. 75
  19. 180
  20. Right
  21. 40
  22. 120
  23. Obtuse
  24. Acute
  25. Acute
  26. 5
  27. Obtuse
  28. Straight
  29. 5
  30. 70
  31. Acute
  32. 70
  33. 60
  34. 35
  35. 180
  36. 130
  37. 60
  38. 35
  39. 110
  40. 90

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