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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 773 · 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 supplement of 125° (in degrees)?
  2. 2.Two straight lines cross each other. One of the angles formed is 24°. What is the angle vertically opposite to it (in degrees)?
  3. 3.Two straight lines cross each other. One of the angles formed is 99°. What is the angle next to it on the same line (in degrees)?
  4. 4.What is the complement of 9° (in degrees)?
  5. 5.Are 39° and 51° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  6. 6.What is the complement of 24° (in degrees)?
  7. 7.Two angles are supplementary. One is 68° more than the other. What is the bigger angle (in degrees)?
  8. 8.Are 24° and 66° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  9. 9.What is the supplement of 103° (in degrees)?
  10. 10.Two straight lines cross each other. One of the angles formed is 146°. What is the angle vertically opposite to it (in degrees)?
  11. 11.What is the complement of 16° (in degrees)?
  12. 12.Two angles are supplementary. One is 34° more than the other. What is the bigger angle (in degrees)?
  13. 13.What is the complement of 23° (in degrees)?
  14. 14.What is the supplement of 163° (in degrees)?
  15. 15.What is the complement of 78° (in degrees)?
  16. 16.Two angles are supplementary. One is 66° more than the other. What is the bigger angle (in degrees)?
  17. 17.Two angles are supplementary. One is 48° more than the other. What is the bigger angle (in degrees)?
  18. 18.Two angles are complementary. One is 30° more than the other. What is the bigger angle (in degrees)?
  19. 19.What is the supplement of 67° (in degrees)?
  20. 20.Two straight lines cross each other. One of the angles formed is 37°. What is the angle next to it on the same line (in degrees)?
  21. 21.What is the supplement of 153° (in degrees)?
  22. 22.Are 69° and 136° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  23. 23.Two parallel lines are cut by a transversal. One angle is 42°. What is its corresponding angle (in degrees)?
  24. 24.Two straight lines cross each other. One of the angles formed is 85°. What is the angle vertically opposite to it (in degrees)?
  25. 25.Two parallel lines are cut by a transversal. One interior angle is 38°. What is its alternate interior angle (in degrees)?
  26. 26.Are 61° and 119° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  27. 27.Are 29° and 61° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  28. 28.What is the supplement of 171° (in degrees)?
  29. 29.What is the complement of 10° (in degrees)?
  30. 30.Two parallel lines are cut by a transversal. One interior angle is 89°. What is its other interior angle on the same side of the transversal (in degrees)?
  31. 31.What is the complement of 53° (in degrees)?
  32. 32.What is the supplement of 9° (in degrees)?
  33. 33.Two parallel lines are cut by a transversal. One interior angle is 43°. What is its alternate interior angle (in degrees)?
  34. 34.What is the supplement of 120° (in degrees)?
  35. 35.Two angles are supplementary. One is 132° more than the other. What is the bigger angle (in degrees)?
  36. 36.Two straight lines cross each other. One of the angles formed is 33°. What is the angle vertically opposite to it (in degrees)?
  37. 37.Are 22° and 143° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  38. 38.Are 48° and 42° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  39. 39.Two parallel lines are cut by a transversal. One interior angle is 147°. What is its alternate interior angle (in degrees)?
  40. 40.Two parallel lines are cut by a transversal. One angle is 89°. What is its corresponding angle (in degrees)?

Answer key

  1. 55
  2. 24
  3. 81
  4. 81
  5. Complementary
  6. 66
  7. 124
  8. Complementary
  9. 77
  10. 146
  11. 74
  12. 107
  13. 67
  14. 17
  15. 12
  16. 123
  17. 114
  18. 60
  19. 113
  20. 143
  21. 27
  22. Neither
  23. 42
  24. 85
  25. 38
  26. Supplementary
  27. Complementary
  28. 9
  29. 80
  30. 91
  31. 37
  32. 171
  33. 43
  34. 60
  35. 156
  36. 33
  37. Neither
  38. Complementary
  39. 147
  40. 89

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