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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 934 · 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 30°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 5 o'clock (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.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  11. 11.An angle measures 55°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  12. 12.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 120°. What is the other angle (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 170°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  19. 19.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  20. 20.An angle measures 160°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  21. 21.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  22. 22.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 50° and 50°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 25° and 80°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  28. 28.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  29. 29.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  30. 30.An angle measures 80°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  31. 31.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 30° and 115°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  39. 39.An angle measures 105°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  40. 40.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?

Answer key

  1. 60
  2. 135
  3. 170
  4. 150
  5. 150
  6. 80
  7. 10
  8. 15
  9. 70
  10. 150
  11. Acute
  12. 35
  13. 120
  14. 60
  15. 85
  16. 10
  17. 180
  18. 75
  19. Right
  20. Obtuse
  21. Straight
  22. 45
  23. 80
  24. 90
  25. 20
  26. 75
  27. 40
  28. Obtuse
  29. 15
  30. Acute
  31. 45
  32. 70
  33. 35
  34. 160
  35. 200
  36. 90
  37. 90
  38. 40
  39. Obtuse
  40. 50

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