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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 427 · 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 23°. What is the angle next to it on the same line (in degrees)?
  2. 2.Two straight lines cross each other. One of the angles formed is 83°. What is the angle vertically opposite to it (in degrees)?
  3. 3.What is the supplement of 74° (in degrees)?
  4. 4.Two parallel lines are cut by a transversal. One interior angle is 61°. What is its alternate interior angle (in degrees)?
  5. 5.Two angles are complementary. One is 2° more than the other. What is the bigger angle (in degrees)?
  6. 6.Two angles are supplementary. One is 2° more than the other. What is the bigger angle (in degrees)?
  7. 7.Two parallel lines are cut by a transversal. One interior angle is 138°. What is its other interior angle on the same side of the transversal (in degrees)?
  8. 8.Two straight lines cross each other. One of the angles formed is 50°. What is the angle vertically opposite to it (in degrees)?
  9. 9.Are 42° and 48° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  10. 10.What is the supplement of 131° (in degrees)?
  11. 11.What is the complement of 23° (in degrees)?
  12. 12.What is the complement of 20° (in degrees)?
  13. 13.Are 19° and 71° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  14. 14.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)?
  15. 15.What is the complement of 17° (in degrees)?
  16. 16.Two straight lines cross each other. One of the angles formed is 147°. What is the angle vertically opposite to it (in degrees)?
  17. 17.Two parallel lines are cut by a transversal. One interior angle is 44°. What is its other interior angle on the same side of the transversal (in degrees)?
  18. 18.Are 26° and 154° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  19. 19.Two angles are complementary. One is 32° more than the other. What is the bigger angle (in degrees)?
  20. 20.Two angles are complementary. One is 52° more than the other. What is the bigger angle (in degrees)?
  21. 21.What is the complement of 66° (in degrees)?
  22. 22.Are 77° and 48° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  23. 23.Are 52° and 128° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  24. 24.Two straight lines cross each other. One of the angles formed is 55°. What is the angle next to it on the same line (in degrees)?
  25. 25.What is the complement of 12° (in degrees)?
  26. 26.What is the supplement of 40° (in degrees)?
  27. 27.Two straight lines cross each other. One of the angles formed is 109°. What is the angle vertically opposite to it (in degrees)?
  28. 28.What is the complement of 28° (in degrees)?
  29. 29.Two parallel lines are cut by a transversal. One interior angle is 123°. What is its alternate interior angle (in degrees)?
  30. 30.What is the complement of 32° (in degrees)?
  31. 31.What is the supplement of 73° (in degrees)?
  32. 32.Are 25° and 47° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  33. 33.Are 69° and 111° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  34. 34.Are 12° and 133° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  35. 35.What is the complement of 18° (in degrees)?
  36. 36.Two straight lines cross each other. One of the angles formed is 127°. What is the angle vertically opposite to it (in degrees)?
  37. 37.What is the supplement of 139° (in degrees)?
  38. 38.Two angles are supplementary. One is 140° more than the other. What is the bigger angle (in degrees)?
  39. 39.Are 32° and 148° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  40. 40.Are 59° and 61° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary

Answer key

  1. 157
  2. 83
  3. 106
  4. 61
  5. 46
  6. 91
  7. 42
  8. 50
  9. Complementary
  10. 49
  11. 67
  12. 70
  13. Complementary
  14. 49
  15. 73
  16. 147
  17. 136
  18. Supplementary
  19. 61
  20. 71
  21. 24
  22. Neither
  23. Supplementary
  24. 125
  25. 78
  26. 140
  27. 109
  28. 62
  29. 123
  30. 58
  31. 107
  32. Neither
  33. Supplementary
  34. Neither
  35. 72
  36. 127
  37. 41
  38. 160
  39. Supplementary
  40. Neither

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