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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 408 · 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 55°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  9. 9.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  10. 10.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  11. 11.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  19. 19.An angle measures 115°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  20. 20.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  25. 25.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  26. 26.An angle measures 80°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  27. 27.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  32. 32.An angle measures 125°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  33. 33.Three angles meet at a point. Two of them are 110° and 180°. What is the third 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 together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  36. 36.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  37. 37.An angle measures 155°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  38. 38.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  39. 39.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  40. 40.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?

Answer key

  1. 35
  2. 80
  3. 35
  4. 110
  5. 130
  6. 80
  7. 60
  8. 45
  9. Obtuse
  10. Right
  11. 80
  12. 30
  13. 160
  14. 250
  15. 150
  16. 20
  17. 230
  18. 135
  19. Obtuse
  20. 110
  21. 10
  22. 60
  23. 90
  24. 120
  25. Obtuse
  26. Acute
  27. 45
  28. 70
  29. 170
  30. 140
  31. 50
  32. Obtuse
  33. 70
  34. 110
  35. 125
  36. Straight
  37. Obtuse
  38. 120
  39. Obtuse
  40. 85

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