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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 603 · 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.Two angles are supplementary. One is 66° more than the other. What is the bigger angle (in degrees)?
  2. 2.Are 29° and 151° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  3. 3.What is the supplement of 7° (in degrees)?
  4. 4.Two straight lines cross each other. One of the angles formed is 81°. What is the angle vertically opposite to it (in degrees)?
  5. 5.What is the supplement of 152° (in degrees)?
  6. 6.What is the supplement of 16° (in degrees)?
  7. 7.What is the complement of 81° (in degrees)?
  8. 8.What is the supplement of 100° (in degrees)?
  9. 9.What is the supplement of 125° (in degrees)?
  10. 10.Are 31° and 149° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  11. 11.Two straight lines cross each other. One of the angles formed is 123°. What is the angle vertically opposite to it (in degrees)?
  12. 12.Are 78° and 12° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  13. 13.What is the complement of 61° (in degrees)?
  14. 14.Are 11° and 46° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  15. 15.What is the complement of 43° (in degrees)?
  16. 16.Two parallel lines are cut by a transversal. One angle is 45°. What is its corresponding angle (in degrees)?
  17. 17.What is the supplement of 145° (in degrees)?
  18. 18.Two angles are supplementary. One is 36° more than the other. What is the bigger angle (in degrees)?
  19. 19.What is the supplement of 69° (in degrees)?
  20. 20.Two straight lines cross each other. One of the angles formed is 125°. What is the angle vertically opposite to it (in degrees)?
  21. 21.What is the supplement of 102° (in degrees)?
  22. 22.What is the complement of 82° (in degrees)?
  23. 23.What is the complement of 28° (in degrees)?
  24. 24.Are 32° and 140° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  25. 25.Two angles are complementary. One is 16° more than the other. What is the bigger angle (in degrees)?
  26. 26.Two straight lines cross each other. One of the angles formed is 114°. What is the angle next to it on the same line (in degrees)?
  27. 27.Two straight lines cross each other. One of the angles formed is 73°. What is the angle next to it on the same line (in degrees)?
  28. 28.Two angles are complementary. One is 12° more than the other. What is the bigger angle (in degrees)?
  29. 29.Two parallel lines are cut by a transversal. One interior angle is 148°. What is its alternate interior angle (in degrees)?
  30. 30.Two parallel lines are cut by a transversal. One interior angle is 143°. What is its alternate interior angle (in degrees)?
  31. 31.What is the supplement of 37° (in degrees)?
  32. 32.Are 61° and 119° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  33. 33.Two angles are supplementary. One is 100° more than the other. What is the bigger angle (in degrees)?
  34. 34.What is the supplement of 109° (in degrees)?
  35. 35.What is the supplement of 17° (in degrees)?
  36. 36.Are 41° and 74° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  37. 37.What is the complement of 47° (in degrees)?
  38. 38.What is the supplement of 74° (in degrees)?
  39. 39.Are 54° and 36° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  40. 40.Two angles are supplementary. One is 132° more than the other. What is the bigger angle (in degrees)?

Answer key

  1. 123
  2. Supplementary
  3. 173
  4. 81
  5. 28
  6. 164
  7. 9
  8. 80
  9. 55
  10. Supplementary
  11. 123
  12. Complementary
  13. 29
  14. Neither
  15. 47
  16. 45
  17. 35
  18. 108
  19. 111
  20. 125
  21. 78
  22. 8
  23. 62
  24. Neither
  25. 53
  26. 66
  27. 107
  28. 51
  29. 148
  30. 143
  31. 143
  32. Supplementary
  33. 140
  34. 71
  35. 163
  36. Neither
  37. 43
  38. 106
  39. Complementary
  40. 156

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