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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 392 · 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 complement of 19° (in degrees)?
  2. 2.What is the supplement of 42° (in degrees)?
  3. 3.What is the supplement of 90° (in degrees)?
  4. 4.Two parallel lines are cut by a transversal. One interior angle is 111°. What is its alternate interior angle (in degrees)?
  5. 5.Two straight lines cross each other. One of the angles formed is 96°. What is the angle next to it on the same line (in degrees)?
  6. 6.Two angles are supplementary. One is 76° more than the other. What is the bigger angle (in degrees)?
  7. 7.Two straight lines cross each other. One of the angles formed is 41°. What is the angle next to it on the same line (in degrees)?
  8. 8.Two angles are complementary. One is 40° more than the other. What is the bigger angle (in degrees)?
  9. 9.What is the complement of 76° (in degrees)?
  10. 10.Two parallel lines are cut by a transversal. One angle is 92°. What is its corresponding angle (in degrees)?
  11. 11.What is the complement of 74° (in degrees)?
  12. 12.Are 40° and 140° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  13. 13.Two straight lines cross each other. One of the angles formed is 33°. What is the angle vertically opposite to it (in degrees)?
  14. 14.What is the complement of 75° (in degrees)?
  15. 15.Two parallel lines are cut by a transversal. One angle is 66°. What is its corresponding angle (in degrees)?
  16. 16.What is the complement of 35° (in degrees)?
  17. 17.Two angles are complementary. One is 20° more than the other. What is the bigger angle (in degrees)?
  18. 18.Are 49° and 41° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  19. 19.Two straight lines cross each other. One of the angles formed is 137°. What is the angle vertically opposite to it (in degrees)?
  20. 20.Are 59° and 31° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  21. 21.Are 80° and 100° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  22. 22.What is the complement of 85° (in degrees)?
  23. 23.What is the supplement of 9° (in degrees)?
  24. 24.Two parallel lines are cut by a transversal. One interior angle is 70°. What is its alternate interior angle (in degrees)?
  25. 25.Two angles are supplementary. One is 70° more than the other. What is the bigger angle (in degrees)?
  26. 26.What is the complement of 26° (in degrees)?
  27. 27.Two straight lines cross each other. One of the angles formed is 133°. What is the angle next to it on the same line (in degrees)?
  28. 28.Two angles are complementary. One is 52° more than the other. What is the bigger angle (in degrees)?
  29. 29.Are 12° and 133° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  30. 30.What is the complement of 84° (in degrees)?
  31. 31.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)?
  32. 32.What is the complement of 65° (in degrees)?
  33. 33.Two parallel lines are cut by a transversal. One interior angle is 40°. What is its other interior angle on the same side of the transversal (in degrees)?
  34. 34.Two straight lines cross each other. One of the angles formed is 34°. What is the angle vertically opposite to it (in degrees)?
  35. 35.Two straight lines cross each other. One of the angles formed is 134°. What is the angle vertically opposite to it (in degrees)?
  36. 36.What is the complement of 62° (in degrees)?
  37. 37.Two straight lines cross each other. One of the angles formed is 51°. What is the angle vertically opposite to it (in degrees)?
  38. 38.What is the supplement of 7° (in degrees)?
  39. 39.What is the complement of 57° (in degrees)?
  40. 40.What is the supplement of 95° (in degrees)?

Answer key

  1. 71
  2. 138
  3. 90
  4. 111
  5. 84
  6. 128
  7. 139
  8. 65
  9. 14
  10. 92
  11. 16
  12. Supplementary
  13. 33
  14. 15
  15. 66
  16. 55
  17. 55
  18. Complementary
  19. 137
  20. Complementary
  21. Supplementary
  22. 5
  23. 171
  24. 70
  25. 125
  26. 64
  27. 47
  28. 71
  29. Neither
  30. 6
  31. 104
  32. 25
  33. 140
  34. 34
  35. 134
  36. 28
  37. 51
  38. 173
  39. 33
  40. 85

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