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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 85 · 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 90° and 110°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  10. 10.An angle measures 75°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  11. 11.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  12. 12.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  13. 13.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  24. 24.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  25. 25.An angle measures 100°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  26. 26.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  32. 32.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  33. 33.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?

Answer key

  1. 160
  2. 160
  3. 40
  4. 100
  5. 170
  6. 145
  7. 20
  8. 150
  9. 15
  10. Acute
  11. 45
  12. Right
  13. 90
  14. 60
  15. 85
  16. 105
  17. 30
  18. 130
  19. 5
  20. 220
  21. 5
  22. 135
  23. 60
  24. Acute
  25. Obtuse
  26. 25
  27. 35
  28. 180
  29. 50
  30. 75
  31. 35
  32. Straight
  33. 60
  34. 155
  35. 20
  36. 110
  37. 75
  38. 40
  39. 10
  40. 55

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