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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 151 · 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 79°. What is the angle vertically opposite to it (in degrees)?
  2. 2.What is the complement of 7° (in degrees)?
  3. 3.What is the supplement of 17° (in degrees)?
  4. 4.Two straight lines cross each other. One of the angles formed is 43°. What is the angle vertically opposite to it (in degrees)?
  5. 5.What is the supplement of 131° (in degrees)?
  6. 6.Two parallel lines are cut by a transversal. One interior angle is 50°. What is its other interior angle on the same side of the transversal (in degrees)?
  7. 7.What is the complement of 80° (in degrees)?
  8. 8.What is the complement of 54° (in degrees)?
  9. 9.What is the complement of 37° (in degrees)?
  10. 10.Two straight lines cross each other. One of the angles formed is 86°. What is the angle vertically opposite to it (in degrees)?
  11. 11.Two angles are complementary. One is 66° more than the other. What is the bigger angle (in degrees)?
  12. 12.Two angles are complementary. One is 42° more than the other. What is the bigger angle (in degrees)?
  13. 13.What is the complement of 6° (in degrees)?
  14. 14.Two angles are supplementary. One is 74° more than the other. What is the bigger angle (in degrees)?
  15. 15.Are 14° and 76° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  16. 16.What is the complement of 40° (in degrees)?
  17. 17.Two straight lines cross each other. One of the angles formed is 72°. What is the angle vertically opposite to it (in degrees)?
  18. 18.Two parallel lines are cut by a transversal. One angle is 44°. What is its corresponding angle (in degrees)?
  19. 19.Two straight lines cross each other. One of the angles formed is 28°. What is the angle next to it on the same line (in degrees)?
  20. 20.Two straight lines cross each other. One of the angles formed is 120°. What is the angle vertically opposite to it (in degrees)?
  21. 21.What is the supplement of 147° (in degrees)?
  22. 22.What is the supplement of 38° (in degrees)?
  23. 23.Are 42° and 48° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  24. 24.Two angles are supplementary. One is 80° more than the other. What is the bigger angle (in degrees)?
  25. 25.What is the complement of 56° (in degrees)?
  26. 26.Two straight lines cross each other. One of the angles formed is 49°. What is the angle next to it on the same line (in degrees)?
  27. 27.Two angles are supplementary. One is 6° more than the other. What is the bigger angle (in degrees)?
  28. 28.Two parallel lines are cut by a transversal. One interior angle is 60°. What is its other interior angle on the same side of the transversal (in degrees)?
  29. 29.Two angles are supplementary. One is 70° more than the other. What is the bigger angle (in degrees)?
  30. 30.Two straight lines cross each other. One of the angles formed is 70°. What is the angle vertically opposite to it (in degrees)?
  31. 31.What is the supplement of 86° (in degrees)?
  32. 32.Are 68° and 22° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  33. 33.Two parallel lines are cut by a transversal. One interior angle is 45°. What is its other interior angle on the same side of the transversal (in degrees)?
  34. 34.Are 24° and 156° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  35. 35.Two angles are supplementary. One is 4° more than the other. What is the bigger angle (in degrees)?
  36. 36.What is the complement of 25° (in degrees)?
  37. 37.Are 16° and 74° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  38. 38.What is the complement of 68° (in degrees)?
  39. 39.What is the supplement of 44° (in degrees)?
  40. 40.What is the supplement of 50° (in degrees)?

Answer key

  1. 79
  2. 83
  3. 163
  4. 43
  5. 49
  6. 130
  7. 10
  8. 36
  9. 53
  10. 86
  11. 78
  12. 66
  13. 84
  14. 127
  15. Complementary
  16. 50
  17. 72
  18. 44
  19. 152
  20. 120
  21. 33
  22. 142
  23. Complementary
  24. 130
  25. 34
  26. 131
  27. 93
  28. 120
  29. 125
  30. 70
  31. 94
  32. Complementary
  33. 135
  34. Supplementary
  35. 92
  36. 65
  37. Complementary
  38. 22
  39. 136
  40. 130

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