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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 572 · 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.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  2. 2.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  3. 3.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  4. 4.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 80° and 30°. What is the third 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.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (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.An angle measures 100°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  18. 18.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  19. 19.An angle measures 175°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  20. 20.Two angles of a triangle are 25° and 40°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 45° and 100°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 95° and 75°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  30. 30.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?

Answer key

  1. 80
  2. Obtuse
  3. Straight
  4. 20
  5. 100
  6. 70
  7. 5
  8. 90
  9. 230
  10. 75
  11. 25
  12. 110
  13. 45
  14. Obtuse
  15. 90
  16. 15
  17. Right
  18. 190
  19. Obtuse
  20. 115
  21. 35
  22. 35
  23. 170
  24. 110
  25. 120
  26. 70
  27. 10
  28. 80
  29. 120
  30. 115
  31. 45
  32. 35
  33. 60
  34. 150
  35. 90
  36. 150
  37. 55
  38. 20
  39. 30
  40. 150

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