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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 577 · 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 of a triangle are 60° and 115°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 140°. 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.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  9. 9.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  10. 10.Two angles of a triangle are 25° and 90°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  12. 12.An angle measures 25°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  13. 13.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 45° and 50°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 75° and 30°. What is the third 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 60°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 70° and 70°. What is the third angle (in degrees)?
  36. 36.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  37. 37.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  38. 38.An angle measures 165°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  39. 39.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?

Answer key

  1. 5
  2. 30
  3. 85
  4. 70
  5. 130
  6. 90
  7. 80
  8. Straight
  9. Acute
  10. 65
  11. 120
  12. Acute
  13. 40
  14. 80
  15. 85
  16. 120
  17. 145
  18. 70
  19. 60
  20. 75
  21. 70
  22. 170
  23. 130
  24. 65
  25. 45
  26. 75
  27. 20
  28. 130
  29. 100
  30. 220
  31. 45
  32. 45
  33. 180
  34. 150
  35. 40
  36. Acute
  37. 30
  38. Obtuse
  39. 110
  40. 125

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