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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 397 · 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 168° (in degrees)?
  2. 2.Two parallel lines are cut by a transversal. One interior angle is 145°. What is its alternate interior angle (in degrees)?
  3. 3.Two straight lines cross each other. One of the angles formed is 142°. What is the angle vertically opposite to it (in degrees)?
  4. 4.Are 75° and 15° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  5. 5.Two angles are supplementary. One is 24° more than the other. What is the bigger angle (in degrees)?
  6. 6.Two parallel lines are cut by a transversal. One angle is 122°. What is its corresponding angle (in degrees)?
  7. 7.What is the supplement of 40° (in degrees)?
  8. 8.Two parallel lines are cut by a transversal. One interior angle is 47°. What is its other interior angle on the same side of the transversal (in degrees)?
  9. 9.What is the complement of 22° (in degrees)?
  10. 10.Two straight lines cross each other. One of the angles formed is 33°. What is the angle vertically opposite to it (in degrees)?
  11. 11.Two straight lines cross each other. One of the angles formed is 132°. What is the angle vertically opposite to it (in degrees)?
  12. 12.Two parallel lines are cut by a transversal. One angle is 37°. What is its corresponding angle (in degrees)?
  13. 13.What is the complement of 73° (in degrees)?
  14. 14.Are 23° and 67° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  15. 15.What is the complement of 81° (in degrees)?
  16. 16.Are 80° and 100° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  17. 17.Are 60° and 30° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  18. 18.Two parallel lines are cut by a transversal. One angle is 50°. What is its corresponding angle (in degrees)?
  19. 19.What is the complement of 7° (in degrees)?
  20. 20.What is the supplement of 124° (in degrees)?
  21. 21.Two parallel lines are cut by a transversal. One angle is 53°. What is its corresponding angle (in degrees)?
  22. 22.What is the supplement of 159° (in degrees)?
  23. 23.Two straight lines cross each other. One of the angles formed is 102°. What is the angle next to it on the same line (in degrees)?
  24. 24.Two straight lines cross each other. One of the angles formed is 55°. What is the angle vertically opposite to it (in degrees)?
  25. 25.Two parallel lines are cut by a transversal. One interior angle is 131°. What is its other interior angle on the same side of the transversal (in degrees)?
  26. 26.Are 11° and 114° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  27. 27.Two straight lines cross each other. One of the angles formed is 136°. What is the angle next to it on the same line (in degrees)?
  28. 28.What is the supplement of 58° (in degrees)?
  29. 29.What is the complement of 14° (in degrees)?
  30. 30.Two parallel lines are cut by a transversal. One angle is 131°. What is its corresponding angle (in degrees)?
  31. 31.Two angles are complementary. One is 26° more than the other. What is the bigger angle (in degrees)?
  32. 32.Two straight lines cross each other. One of the angles formed is 148°. What is the angle next to it on the same line (in degrees)?
  33. 33.Two angles are supplementary. One is 72° more than the other. What is the bigger angle (in degrees)?
  34. 34.What is the complement of 84° (in degrees)?
  35. 35.Two angles are supplementary. One is 30° more than the other. What is the bigger angle (in degrees)?
  36. 36.What is the complement of 21° (in degrees)?
  37. 37.Two parallel lines are cut by a transversal. One interior angle is 150°. What is its alternate interior angle (in degrees)?
  38. 38.Are 22° and 158° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  39. 39.What is the supplement of 121° (in degrees)?
  40. 40.What is the supplement of 37° (in degrees)?

Answer key

  1. 12
  2. 145
  3. 142
  4. Complementary
  5. 102
  6. 122
  7. 140
  8. 133
  9. 68
  10. 33
  11. 132
  12. 37
  13. 17
  14. Complementary
  15. 9
  16. Supplementary
  17. Complementary
  18. 50
  19. 83
  20. 56
  21. 53
  22. 21
  23. 78
  24. 55
  25. 49
  26. Neither
  27. 44
  28. 122
  29. 76
  30. 131
  31. 58
  32. 32
  33. 126
  34. 6
  35. 105
  36. 69
  37. 150
  38. Supplementary
  39. 59
  40. 143

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