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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 480 · 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 103°. What is the angle next to it on the same line (in degrees)?
  2. 2.Two angles are supplementary. One is 100° more than the other. What is the bigger angle (in degrees)?
  3. 3.What is the complement of 39° (in degrees)?
  4. 4.Two parallel lines are cut by a transversal. One angle is 98°. What is its corresponding angle (in degrees)?
  5. 5.Two parallel lines are cut by a transversal. One interior angle is 133°. What is its alternate interior angle (in degrees)?
  6. 6.Two straight lines cross each other. One of the angles formed is 125°. What is the angle vertically opposite to it (in degrees)?
  7. 7.Two parallel lines are cut by a transversal. One angle is 127°. What is its corresponding angle (in degrees)?
  8. 8.Are 77° and 42° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  9. 9.What is the supplement of 165° (in degrees)?
  10. 10.Two angles are supplementary. One is 60° more than the other. What is the bigger angle (in degrees)?
  11. 11.Are 62° and 118° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  12. 12.Two angles are complementary. One is 20° more than the other. What is the bigger angle (in degrees)?
  13. 13.Are 12° and 123° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  14. 14.Two straight lines cross each other. One of the angles formed is 48°. What is the angle vertically opposite to it (in degrees)?
  15. 15.What is the complement of 20° (in degrees)?
  16. 16.Two parallel lines are cut by a transversal. One interior angle is 34°. What is its alternate interior angle (in degrees)?
  17. 17.Two angles are complementary. One is 32° more than the other. What is the bigger angle (in degrees)?
  18. 18.What is the complement of 66° (in degrees)?
  19. 19.Are 68° and 27° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  20. 20.What is the supplement of 150° (in degrees)?
  21. 21.Two straight lines cross each other. One of the angles formed is 26°. What is the angle vertically opposite to it (in degrees)?
  22. 22.What is the complement of 44° (in degrees)?
  23. 23.What is the complement of 40° (in degrees)?
  24. 24.Two straight lines cross each other. One of the angles formed is 156°. What is the angle next to it on the same line (in degrees)?
  25. 25.Are 32° and 58° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  26. 26.Two straight lines cross each other. One of the angles formed is 56°. What is the angle next to it on the same line (in degrees)?
  27. 27.Two angles are supplementary. One is 42° more than the other. What is the bigger angle (in degrees)?
  28. 28.Two straight lines cross each other. One of the angles formed is 79°. What is the angle next to it on the same line (in degrees)?
  29. 29.Are 16° and 74° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  30. 30.Are 27° and 153° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  31. 31.What is the supplement of 38° (in degrees)?
  32. 32.What is the supplement of 11° (in degrees)?
  33. 33.What is the supplement of 33° (in degrees)?
  34. 34.Two straight lines cross each other. One of the angles formed is 112°. What is the angle next to it on the same line (in degrees)?
  35. 35.Are 77° and 13° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  36. 36.Two angles are complementary. One is 18° more than the other. What is the bigger angle (in degrees)?
  37. 37.Two parallel lines are cut by a transversal. One angle is 50°. What is its corresponding angle (in degrees)?
  38. 38.Are 12° and 23° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  39. 39.What is the supplement of 127° (in degrees)?
  40. 40.Two parallel lines are cut by a transversal. One interior angle is 99°. What is its other interior angle on the same side of the transversal (in degrees)?

Answer key

  1. 77
  2. 140
  3. 51
  4. 98
  5. 133
  6. 125
  7. 127
  8. Neither
  9. 15
  10. 120
  11. Supplementary
  12. 55
  13. Neither
  14. 48
  15. 70
  16. 34
  17. 61
  18. 24
  19. Neither
  20. 30
  21. 26
  22. 46
  23. 50
  24. 24
  25. Complementary
  26. 124
  27. 111
  28. 101
  29. Complementary
  30. Supplementary
  31. 142
  32. 169
  33. 147
  34. 68
  35. Complementary
  36. 54
  37. 50
  38. Neither
  39. 53
  40. 81

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