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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 774 · 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 straight lines cross each other. One of the angles formed is 80°. What is the angle vertically opposite to it (in degrees)?
  2. 2.What is the supplement of 79° (in degrees)?
  3. 3.Two straight lines cross each other. One of the angles formed is 130°. What is the angle vertically opposite to it (in degrees)?
  4. 4.What is the supplement of 87° (in degrees)?
  5. 5.What is the supplement of 106° (in degrees)?
  6. 6.What is the supplement of 43° (in degrees)?
  7. 7.What is the supplement of 156° (in degrees)?
  8. 8.What is the complement of 83° (in degrees)?
  9. 9.Are 38° and 142° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  10. 10.Two angles are supplementary. One is 86° more than the other. What is the bigger angle (in degrees)?
  11. 11.What is the complement of 38° (in degrees)?
  12. 12.What is the complement of 85° (in degrees)?
  13. 13.Two straight lines cross each other. One of the angles formed is 47°. What is the angle next to it on the same line (in degrees)?
  14. 14.What is the complement of 75° (in degrees)?
  15. 15.Are 19° and 141° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  16. 16.What is the complement of 71° (in degrees)?
  17. 17.Two angles are complementary. One is 18° more than the other. What is the bigger angle (in degrees)?
  18. 18.What is the complement of 43° (in degrees)?
  19. 19.Two straight lines cross each other. One of the angles formed is 96°. What is the angle vertically opposite to it (in degrees)?
  20. 20.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)?
  21. 21.Two angles are complementary. One is 58° more than the other. What is the bigger angle (in degrees)?
  22. 22.Two parallel lines are cut by a transversal. One angle is 73°. What is its corresponding angle (in degrees)?
  23. 23.Are 19° and 71° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  24. 24.What is the supplement of 101° (in degrees)?
  25. 25.Two angles are complementary. One is 60° more than the other. What is the bigger angle (in degrees)?
  26. 26.Are 44° and 46° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  27. 27.Two straight lines cross each other. One of the angles formed is 29°. What is the angle next to it on the same line (in degrees)?
  28. 28.Are 38° and 85° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  29. 29.Two parallel lines are cut by a transversal. One interior angle is 91°. What is its other interior angle on the same side of the transversal (in degrees)?
  30. 30.Two parallel lines are cut by a transversal. One angle is 148°. What is its corresponding angle (in degrees)?
  31. 31.Are 49° and 41° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  32. 32.What is the supplement of 19° (in degrees)?
  33. 33.Are 19° and 11° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  34. 34.What is the supplement of 33° (in degrees)?
  35. 35.Two parallel lines are cut by a transversal. One interior angle is 134°. What is its alternate interior angle (in degrees)?
  36. 36.What is the complement of 25° (in degrees)?
  37. 37.Two straight lines cross each other. One of the angles formed is 75°. What is the angle next to it on the same line (in degrees)?
  38. 38.What is the complement of 12° (in degrees)?
  39. 39.Two angles are complementary. One is 4° more than the other. What is the bigger angle (in degrees)?
  40. 40.What is the complement of 26° (in degrees)?

Answer key

  1. 80
  2. 101
  3. 130
  4. 93
  5. 74
  6. 137
  7. 24
  8. 7
  9. Supplementary
  10. 133
  11. 52
  12. 5
  13. 133
  14. 15
  15. Neither
  16. 19
  17. 54
  18. 47
  19. 96
  20. 138
  21. 74
  22. 73
  23. Complementary
  24. 79
  25. 75
  26. Complementary
  27. 151
  28. Neither
  29. 89
  30. 148
  31. Complementary
  32. 161
  33. Neither
  34. 147
  35. 134
  36. 65
  37. 105
  38. 78
  39. 47
  40. 64

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