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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 141 · 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.Are 24° and 130° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  2. 2.What is the supplement of 36° (in degrees)?
  3. 3.What is the complement of 19° (in degrees)?
  4. 4.Two straight lines cross each other. One of the angles formed is 60°. What is the angle vertically opposite to it (in degrees)?
  5. 5.Two straight lines cross each other. One of the angles formed is 111°. What is the angle vertically opposite to it (in degrees)?
  6. 6.What is the supplement of 82° (in degrees)?
  7. 7.What is the complement of 13° (in degrees)?
  8. 8.Two parallel lines are cut by a transversal. One interior angle is 98°. What is its alternate interior angle (in degrees)?
  9. 9.What is the complement of 81° (in degrees)?
  10. 10.What is the complement of 60° (in degrees)?
  11. 11.What is the supplement of 104° (in degrees)?
  12. 12.Two straight lines cross each other. One of the angles formed is 113°. What is the angle vertically opposite to it (in degrees)?
  13. 13.Are 10° and 96° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  14. 14.Two angles are complementary. One is 8° more than the other. What is the bigger angle (in degrees)?
  15. 15.Two parallel lines are cut by a transversal. One interior angle is 75°. What is its alternate interior angle (in degrees)?
  16. 16.What is the supplement of 92° (in degrees)?
  17. 17.What is the complement of 17° (in degrees)?
  18. 18.Two angles are complementary. One is 66° more than the other. What is the bigger angle (in degrees)?
  19. 19.Are 50° and 98° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  20. 20.What is the complement of 78° (in degrees)?
  21. 21.Two angles are complementary. One is 56° more than the other. What is the bigger angle (in degrees)?
  22. 22.Two straight lines cross each other. One of the angles formed is 90°. What is the angle vertically opposite to it (in degrees)?
  23. 23.Two straight lines cross each other. One of the angles formed is 84°. What is the angle vertically opposite to it (in degrees)?
  24. 24.Two straight lines cross each other. One of the angles formed is 153°. What is the angle next to it on the same line (in degrees)?
  25. 25.Are 20° and 160° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  26. 26.What is the supplement of 44° (in degrees)?
  27. 27.What is the complement of 75° (in degrees)?
  28. 28.Two straight lines cross each other. One of the angles formed is 94°. What is the angle vertically opposite to it (in degrees)?
  29. 29.What is the supplement of 133° (in degrees)?
  30. 30.Two straight lines cross each other. One of the angles formed is 39°. What is the angle vertically opposite to it (in degrees)?
  31. 31.Are 30° and 82° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  32. 32.Two parallel lines are cut by a transversal. One interior angle is 115°. What is its other interior angle on the same side of the transversal (in degrees)?
  33. 33.Are 46° and 150° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  34. 34.What is the supplement of 14° (in degrees)?
  35. 35.Are 63° and 27° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  36. 36.Are 74° and 106° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  37. 37.Two straight lines cross each other. One of the angles formed is 143°. What is the angle next to it on the same line (in degrees)?
  38. 38.Two straight lines cross each other. One of the angles formed is 66°. What is the angle next to it on the same line (in degrees)?
  39. 39.Two angles are supplementary. One is 28° more than the other. What is the bigger angle (in degrees)?
  40. 40.What is the complement of 33° (in degrees)?

Answer key

  1. Neither
  2. 144
  3. 71
  4. 60
  5. 111
  6. 98
  7. 77
  8. 98
  9. 9
  10. 30
  11. 76
  12. 113
  13. Neither
  14. 49
  15. 75
  16. 88
  17. 73
  18. 78
  19. Neither
  20. 12
  21. 73
  22. 90
  23. 84
  24. 27
  25. Supplementary
  26. 136
  27. 15
  28. 94
  29. 47
  30. 39
  31. Neither
  32. 65
  33. Neither
  34. 166
  35. Complementary
  36. Supplementary
  37. 37
  38. 114
  39. 104
  40. 57

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