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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 781 · 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 supplement of 161° (in degrees)?
  2. 2.Two straight lines cross each other. One of the angles formed is 71°. What is the angle vertically opposite to it (in degrees)?
  3. 3.Are 11° and 79° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  4. 4.What is the complement of 28° (in degrees)?
  5. 5.What is the supplement of 130° (in degrees)?
  6. 6.Are 10° and 170° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  7. 7.Two parallel lines are cut by a transversal. One angle is 68°. What is its corresponding angle (in degrees)?
  8. 8.What is the complement of 83° (in degrees)?
  9. 9.Two angles are complementary. One is 36° more than the other. What is the bigger angle (in degrees)?
  10. 10.Two angles are supplementary. One is 32° more than the other. What is the bigger angle (in degrees)?
  11. 11.What is the supplement of 67° (in degrees)?
  12. 12.Two parallel lines are cut by a transversal. One interior angle is 86°. What is its alternate interior angle (in degrees)?
  13. 13.What is the supplement of 156° (in degrees)?
  14. 14.What is the supplement of 143° (in degrees)?
  15. 15.Two parallel lines are cut by a transversal. One interior angle is 137°. What is its alternate interior angle (in degrees)?
  16. 16.Two parallel lines are cut by a transversal. One angle is 46°. What is its corresponding angle (in degrees)?
  17. 17.Two angles are supplementary. One is 18° more than the other. What is the bigger angle (in degrees)?
  18. 18.Two angles are supplementary. One is 42° more than the other. What is the bigger angle (in degrees)?
  19. 19.Are 26° and 154° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  20. 20.Are 73° and 107° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  21. 21.Two parallel lines are cut by a transversal. One interior angle is 80°. What is its alternate interior angle (in degrees)?
  22. 22.What is the supplement of 19° (in degrees)?
  23. 23.Two parallel lines are cut by a transversal. One interior angle is 78°. What is its other interior angle on the same side of the transversal (in degrees)?
  24. 24.Two angles are complementary. One is 12° more than the other. What is the bigger angle (in degrees)?
  25. 25.Two angles are complementary. One is 58° more than the other. What is the bigger angle (in degrees)?
  26. 26.Two angles are supplementary. One is 68° more than the other. What is the bigger angle (in degrees)?
  27. 27.What is the complement of 21° (in degrees)?
  28. 28.What is the supplement of 29° (in degrees)?
  29. 29.Two straight lines cross each other. One of the angles formed is 50°. What is the angle next to it on the same line (in degrees)?
  30. 30.Are 25° and 55° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  31. 31.What is the supplement of 18° (in degrees)?
  32. 32.Two angles are complementary. One is 50° more than the other. What is the bigger angle (in degrees)?
  33. 33.Two parallel lines are cut by a transversal. One angle is 150°. What is its corresponding angle (in degrees)?
  34. 34.Two straight lines cross each other. One of the angles formed is 69°. What is the angle next to it on the same line (in degrees)?
  35. 35.What is the supplement of 48° (in degrees)?
  36. 36.Two parallel lines are cut by a transversal. One angle is 36°. What is its corresponding angle (in degrees)?
  37. 37.Two angles are complementary. One is 60° more than the other. What is the bigger angle (in degrees)?
  38. 38.What is the complement of 62° (in degrees)?
  39. 39.What is the complement of 18° (in degrees)?
  40. 40.What is the complement of 50° (in degrees)?

Answer key

  1. 19
  2. 71
  3. Complementary
  4. 62
  5. 50
  6. Supplementary
  7. 68
  8. 7
  9. 63
  10. 106
  11. 113
  12. 86
  13. 24
  14. 37
  15. 137
  16. 46
  17. 99
  18. 111
  19. Supplementary
  20. Supplementary
  21. 80
  22. 161
  23. 102
  24. 51
  25. 74
  26. 124
  27. 69
  28. 151
  29. 130
  30. Neither
  31. 162
  32. 70
  33. 150
  34. 111
  35. 132
  36. 36
  37. 75
  38. 28
  39. 72
  40. 40

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