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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 648 · 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 128°. What is the angle vertically opposite to it (in degrees)?
  2. 2.Are 51° and 99° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  3. 3.Two straight lines cross each other. One of the angles formed is 120°. What is the angle vertically opposite to it (in degrees)?
  4. 4.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)?
  5. 5.What is the complement of 54° (in degrees)?
  6. 6.What is the supplement of 116° (in degrees)?
  7. 7.Two straight lines cross each other. One of the angles formed is 33°. What is the angle vertically opposite to it (in degrees)?
  8. 8.Two straight lines cross each other. One of the angles formed is 103°. What is the angle vertically opposite to it (in degrees)?
  9. 9.Two parallel lines are cut by a transversal. One angle is 88°. What is its corresponding angle (in degrees)?
  10. 10.Are 27° and 63° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  11. 11.Two straight lines cross each other. One of the angles formed is 136°. What is the angle vertically opposite to it (in degrees)?
  12. 12.Are 30° and 150° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  13. 13.What is the supplement of 173° (in degrees)?
  14. 14.Two straight lines cross each other. One of the angles formed is 33°. What is the angle next to it on the same line (in degrees)?
  15. 15.Two angles are complementary. One is 60° more than the other. What is the bigger angle (in degrees)?
  16. 16.Two parallel lines are cut by a transversal. One angle is 99°. What is its corresponding angle (in degrees)?
  17. 17.Two angles are complementary. One is 6° more than the other. What is the bigger angle (in degrees)?
  18. 18.Two straight lines cross each other. One of the angles formed is 145°. What is the angle next to it on the same line (in degrees)?
  19. 19.Are 25° and 55° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  20. 20.Two angles are complementary. One is 14° more than the other. What is the bigger angle (in degrees)?
  21. 21.Are 58° and 122° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  22. 22.What is the supplement of 121° (in degrees)?
  23. 23.What is the supplement of 54° (in degrees)?
  24. 24.Are 13° and 77° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  25. 25.Two angles are supplementary. One is 98° more than the other. What is the bigger angle (in degrees)?
  26. 26.Two angles are complementary. One is 20° more than the other. What is the bigger angle (in degrees)?
  27. 27.Are 50° and 94° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  28. 28.What is the supplement of 20° (in degrees)?
  29. 29.What is the supplement of 75° (in degrees)?
  30. 30.What is the complement of 29° (in degrees)?
  31. 31.What is the complement of 46° (in degrees)?
  32. 32.Two straight lines cross each other. One of the angles formed is 153°. What is the angle next to it on the same line (in degrees)?
  33. 33.Two parallel lines are cut by a transversal. One interior angle is 111°. What is its alternate interior angle (in degrees)?
  34. 34.What is the supplement of 16° (in degrees)?
  35. 35.What is the complement of 65° (in degrees)?
  36. 36.Are 38° and 35° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  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.Two straight lines cross each other. One of the angles formed is 40°. What is the angle vertically opposite to it (in degrees)?
  39. 39.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)?
  40. 40.Are 69° and 111° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary

Answer key

  1. 128
  2. Neither
  3. 120
  4. 157
  5. 36
  6. 64
  7. 33
  8. 103
  9. 88
  10. Complementary
  11. 136
  12. Supplementary
  13. 7
  14. 147
  15. 75
  16. 99
  17. 48
  18. 35
  19. Neither
  20. 52
  21. Supplementary
  22. 59
  23. 126
  24. Complementary
  25. 139
  26. 55
  27. Neither
  28. 160
  29. 105
  30. 61
  31. 44
  32. 27
  33. 111
  34. 164
  35. 25
  36. Neither
  37. 105
  38. 40
  39. 49
  40. Supplementary

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