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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 735 · 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 90° and 30°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  6. 6.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  7. 7.An angle measures 115°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  8. 8.Two angles of a triangle are 60° and 60°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  11. 11.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  12. 12.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 60° and 220°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  16. 16.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  17. 17.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 40° and 80°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  37. 37.An angle measures 150°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  38. 38.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?

Answer key

  1. 60
  2. 130
  3. 165
  4. 60
  5. Right
  6. 145
  7. Obtuse
  8. 60
  9. 65
  10. 100
  11. Acute
  12. 90
  13. 80
  14. 25
  15. 130
  16. Acute
  17. 120
  18. 120
  19. 180
  20. 50
  21. 25
  22. 45
  23. 60
  24. 10
  25. 35
  26. 60
  27. 85
  28. 155
  29. 180
  30. 90
  31. 35
  32. 55
  33. 15
  34. 95
  35. 30
  36. 85
  37. Obtuse
  38. 60
  39. 10
  40. 130

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