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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 545 · 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 149°. What is the angle vertically opposite to it (in degrees)?
  2. 2.Two straight lines cross each other. One of the angles formed is 138°. What is the angle next to it on the same line (in degrees)?
  3. 3.Two straight lines cross each other. One of the angles formed is 70°. What is the angle next to it on the same line (in degrees)?
  4. 4.Are 48° and 42° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  5. 5.What is the complement of 57° (in degrees)?
  6. 6.Two parallel lines are cut by a transversal. One interior angle is 54°. What is its alternate interior angle (in degrees)?
  7. 7.Two straight lines cross each other. One of the angles formed is 55°. What is the angle vertically opposite to it (in degrees)?
  8. 8.What is the supplement of 154° (in degrees)?
  9. 9.What is the supplement of 82° (in degrees)?
  10. 10.What is the supplement of 115° (in degrees)?
  11. 11.What is the supplement of 26° (in degrees)?
  12. 12.Two angles are complementary. One is 12° more than the other. What is the bigger angle (in degrees)?
  13. 13.Are 28° and 62° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  14. 14.Two parallel lines are cut by a transversal. One angle is 45°. What is its corresponding angle (in degrees)?
  15. 15.Are 19° and 71° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  16. 16.Two parallel lines are cut by a transversal. One angle is 149°. What is its corresponding angle (in degrees)?
  17. 17.What is the supplement of 95° (in degrees)?
  18. 18.What is the supplement of 68° (in degrees)?
  19. 19.What is the supplement of 47° (in degrees)?
  20. 20.What is the supplement of 6° (in degrees)?
  21. 21.Are 36° and 144° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  22. 22.What is the complement of 46° (in degrees)?
  23. 23.What is the complement of 83° (in degrees)?
  24. 24.Two straight lines cross each other. One of the angles formed is 150°. What is the angle next to it on the same line (in degrees)?
  25. 25.Two parallel lines are cut by a transversal. One angle is 89°. What is its corresponding angle (in degrees)?
  26. 26.Two straight lines cross each other. One of the angles formed is 104°. What is the angle vertically opposite to it (in degrees)?
  27. 27.What is the supplement of 146° (in degrees)?
  28. 28.Are 64° and 116° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  29. 29.Are 11° and 79° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  30. 30.Are 22° and 158° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  31. 31.What is the supplement of 42° (in degrees)?
  32. 32.What is the supplement of 24° (in degrees)?
  33. 33.What is the complement of 73° (in degrees)?
  34. 34.What is the complement of 16° (in degrees)?
  35. 35.Two straight lines cross each other. One of the angles formed is 140°. What is the angle vertically opposite to it (in degrees)?
  36. 36.Two angles are supplementary. One is 72° more than the other. What is the bigger angle (in degrees)?
  37. 37.What is the supplement of 79° (in degrees)?
  38. 38.Two straight lines cross each other. One of the angles formed is 76°. What is the angle next to it on the same line (in degrees)?
  39. 39.Are 56° and 10° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  40. 40.Two parallel lines are cut by a transversal. One interior angle is 98°. What is its alternate interior angle (in degrees)?

Answer key

  1. 149
  2. 42
  3. 110
  4. Complementary
  5. 33
  6. 54
  7. 55
  8. 26
  9. 98
  10. 65
  11. 154
  12. 51
  13. Complementary
  14. 45
  15. Complementary
  16. 149
  17. 85
  18. 112
  19. 133
  20. 174
  21. Supplementary
  22. 44
  23. 7
  24. 30
  25. 89
  26. 104
  27. 34
  28. Supplementary
  29. Complementary
  30. Supplementary
  31. 138
  32. 156
  33. 17
  34. 74
  35. 140
  36. 126
  37. 101
  38. 104
  39. Neither
  40. 98

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