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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 93 · 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 45°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  3. 3.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  4. 4.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  5. 5.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  6. 6.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  8. 8.Two angles of a triangle are 65° and 25°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 80° and 55°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 75° and 60°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  17. 17.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  18. 18.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 85° and 55°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 30° and 125°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 35° and 45°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?

Answer key

  1. 45
  2. 15
  3. Acute
  4. 90
  5. Acute
  6. 5
  7. Right
  8. 90
  9. 130
  10. 170
  11. 10
  12. 45
  13. 150
  14. 105
  15. 45
  16. 140
  17. Straight
  18. 70
  19. 40
  20. 25
  21. 170
  22. 95
  23. 120
  24. 10
  25. 90
  26. 100
  27. 120
  28. 25
  29. 140
  30. 90
  31. 60
  32. 90
  33. 110
  34. 210
  35. 140
  36. 25
  37. 65
  38. 65
  39. 80
  40. 40

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