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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 838 · 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 82° (in degrees)?
  2. 2.What is the supplement of 122° (in degrees)?
  3. 3.Two angles are complementary. One is 50° more than the other. What is the bigger angle (in degrees)?
  4. 4.Are 57° and 123° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  5. 5.What is the complement of 71° (in degrees)?
  6. 6.Are 79° and 101° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  7. 7.What is the supplement of 65° (in degrees)?
  8. 8.Are 60° and 120° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  9. 9.Two angles are complementary. One is 12° more than the other. What is the bigger angle (in degrees)?
  10. 10.What is the supplement of 131° (in degrees)?
  11. 11.Two parallel lines are cut by a transversal. One angle is 131°. What is its corresponding angle (in degrees)?
  12. 12.Two straight lines cross each other. One of the angles formed is 62°. What is the angle next to it on the same line (in degrees)?
  13. 13.Two parallel lines are cut by a transversal. One angle is 49°. What is its corresponding angle (in degrees)?
  14. 14.Two angles are supplementary. One is 102° more than the other. What is the bigger angle (in degrees)?
  15. 15.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)?
  16. 16.Two parallel lines are cut by a transversal. One angle is 149°. What is its corresponding angle (in degrees)?
  17. 17.Two parallel lines are cut by a transversal. One interior angle is 64°. What is its alternate interior angle (in degrees)?
  18. 18.What is the supplement of 86° (in degrees)?
  19. 19.Two parallel lines are cut by a transversal. One interior angle is 103°. What is its alternate interior angle (in degrees)?
  20. 20.What is the complement of 80° (in degrees)?
  21. 21.What is the complement of 73° (in degrees)?
  22. 22.What is the complement of 10° (in degrees)?
  23. 23.Two straight lines cross each other. One of the angles formed is 147°. What is the angle next to it on the same line (in degrees)?
  24. 24.What is the complement of 49° (in degrees)?
  25. 25.Two straight lines cross each other. One of the angles formed is 29°. What is the angle vertically opposite to it (in degrees)?
  26. 26.Two straight lines cross each other. One of the angles formed is 95°. What is the angle vertically opposite to it (in degrees)?
  27. 27.Two parallel lines are cut by a transversal. One interior angle is 47°. What is its alternate interior angle (in degrees)?
  28. 28.Two angles are complementary. One is 68° more than the other. What is the bigger angle (in degrees)?
  29. 29.What is the supplement of 118° (in degrees)?
  30. 30.Two straight lines cross each other. One of the angles formed is 93°. What is the angle next to it on the same line (in degrees)?
  31. 31.What is the complement of 72° (in degrees)?
  32. 32.What is the supplement of 87° (in degrees)?
  33. 33.Two parallel lines are cut by a transversal. One interior angle is 134°. What is its alternate interior angle (in degrees)?
  34. 34.Two parallel lines are cut by a transversal. One angle is 63°. What is its corresponding angle (in degrees)?
  35. 35.What is the supplement of 47° (in degrees)?
  36. 36.Two angles are complementary. One is 38° more than the other. What is the bigger angle (in degrees)?
  37. 37.What is the complement of 20° (in degrees)?
  38. 38.What is the complement of 74° (in degrees)?
  39. 39.Two straight lines cross each other. One of the angles formed is 142°. What is the angle next to it on the same line (in degrees)?
  40. 40.Two parallel lines are cut by a transversal. One interior angle is 43°. What is its other interior angle on the same side of the transversal (in degrees)?

Answer key

  1. 98
  2. 58
  3. 70
  4. Supplementary
  5. 19
  6. Supplementary
  7. 115
  8. Supplementary
  9. 51
  10. 49
  11. 131
  12. 118
  13. 49
  14. 141
  15. 42
  16. 149
  17. 64
  18. 94
  19. 103
  20. 10
  21. 17
  22. 80
  23. 33
  24. 41
  25. 29
  26. 95
  27. 47
  28. 79
  29. 62
  30. 87
  31. 18
  32. 93
  33. 134
  34. 63
  35. 133
  36. 64
  37. 70
  38. 16
  39. 38
  40. 137

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