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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 551 · 40 sums
TalentJR

The method (90, 180, equal): Complement of a = 90 − a. Supplement of a = 180 − a. Lines crossing: vertically opposite angles are equal; a linear pair adds up to 180°. Parallel lines: corresponding angles equal, alternate interior angles equal, interior angles on the same side add up to 180°. One angle d° more than the other: bigger = (total + d) ÷ 2.

NameDateTime takenScore ___ / 40
  1. 1.What is the complement of 19° (in degrees)?
  2. 2.Two straight lines cross each other. One of the angles formed is 90°. What is the angle vertically opposite to it (in degrees)?
  3. 3.What is the supplement of 93° (in degrees)?
  4. 4.What is the supplement of 7° (in degrees)?
  5. 5.What is the supplement of 103° (in degrees)?
  6. 6.Two straight lines cross each other. One of the angles formed is 24°. What is the angle vertically opposite to it (in degrees)?
  7. 7.Two straight lines cross each other. One of the angles formed is 144°. What is the angle next to it on the same line (in degrees)?
  8. 8.Two straight lines cross each other. One of the angles formed is 65°. What is the angle vertically opposite to it (in degrees)?
  9. 9.Two straight lines cross each other. One of the angles formed is 25°. What is the angle vertically opposite to it (in degrees)?
  10. 10.Two angles are complementary. One is 60° more than the other. What is the bigger angle (in degrees)?
  11. 11.Two straight lines cross each other. One of the angles formed is 32°. What is the angle next to it on the same line (in degrees)?
  12. 12.What is the supplement of 160° (in degrees)?
  13. 13.Are 79° and 11° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  14. 14.Two straight lines cross each other. One of the angles formed is 42°. What is the angle next to it on the same line (in degrees)?
  15. 15.Two parallel lines are cut by a transversal. One interior angle is 143°. What is its other interior angle on the same side of the transversal (in degrees)?
  16. 16.Two angles are supplementary. One is 126° more than the other. What is the bigger angle (in degrees)?
  17. 17.What is the complement of 45° (in degrees)?
  18. 18.Two straight lines cross each other. One of the angles formed is 107°. What is the angle next to it on the same line (in degrees)?
  19. 19.Two straight lines cross each other. One of the angles formed is 52°. What is the angle next to it on the same line (in degrees)?
  20. 20.Two straight lines cross each other. One of the angles formed is 103°. What is the angle vertically opposite to it (in degrees)?
  21. 21.Two parallel lines are cut by a transversal. One angle is 121°. What is its corresponding angle (in degrees)?
  22. 22.Two angles are complementary. One is 10° more than the other. What is the bigger angle (in degrees)?
  23. 23.Two angles are supplementary. One is 32° more than the other. What is the bigger angle (in degrees)?
  24. 24.Two parallel lines are cut by a transversal. One interior angle is 43°. What is its alternate interior angle (in degrees)?
  25. 25.Two parallel lines are cut by a transversal. One angle is 46°. What is its corresponding angle (in degrees)?
  26. 26.Two straight lines cross each other. One of the angles formed is 44°. What is the angle vertically opposite to it (in degrees)?
  27. 27.Are 60° and 120° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  28. 28.What is the supplement of 111° (in degrees)?
  29. 29.Are 73° and 17° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  30. 30.What is the complement of 37° (in degrees)?
  31. 31.Are 75° and 55° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  32. 32.Two parallel lines are cut by a transversal. One angle is 66°. What is its corresponding angle (in degrees)?
  33. 33.Two parallel lines are cut by a transversal. One interior angle is 136°. What is its other interior angle on the same side of the transversal (in degrees)?
  34. 34.Are 40° and 140° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  35. 35.What is the supplement of 52° (in degrees)?
  36. 36.Two angles are complementary. One is 32° more than the other. What is the bigger angle (in degrees)?
  37. 37.Are 67° and 113° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  38. 38.Two straight lines cross each other. One of the angles formed is 132°. What is the angle next to it on the same line (in degrees)?
  39. 39.What is the complement of 47° (in degrees)?
  40. 40.What is the supplement of 37° (in degrees)?

Answer key

  1. 71
  2. 90
  3. 87
  4. 173
  5. 77
  6. 24
  7. 36
  8. 65
  9. 25
  10. 75
  11. 148
  12. 20
  13. Complementary
  14. 138
  15. 37
  16. 153
  17. 45
  18. 73
  19. 128
  20. 103
  21. 121
  22. 50
  23. 106
  24. 43
  25. 46
  26. 44
  27. Supplementary
  28. 69
  29. Complementary
  30. 53
  31. Neither
  32. 66
  33. 44
  34. Supplementary
  35. 128
  36. 61
  37. Supplementary
  38. 48
  39. 43
  40. 143

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