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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 156 · 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.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  8. 8.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  9. 9.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 55° and 30°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  24. 24.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  25. 25.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  26. 26.An angle measures 120°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  27. 27.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  30. 30.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  31. 31.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  32. 32.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  33. 33.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?

Answer key

  1. 10
  2. 50
  3. 165
  4. 230
  5. 150
  6. 20
  7. 5
  8. Obtuse
  9. 60
  10. 180
  11. 145
  12. 100
  13. 95
  14. 85
  15. 120
  16. 130
  17. 65
  18. 60
  19. 70
  20. 75
  21. 70
  22. 150
  23. 150
  24. Straight
  25. 120
  26. Obtuse
  27. 170
  28. 40
  29. 110
  30. Obtuse
  31. 85
  32. Right
  33. 55
  34. 170
  35. 30
  36. 30
  37. 50
  38. 80
  39. 130
  40. 10

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