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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 409 · 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 25° (in degrees)?
  2. 2.Two straight lines cross each other. One of the angles formed is 80°. What is the angle vertically opposite to it (in degrees)?
  3. 3.What is the supplement of 170° (in degrees)?
  4. 4.Are 43° and 137° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  5. 5.Two straight lines cross each other. One of the angles formed is 107°. What is the angle next to it on the same line (in degrees)?
  6. 6.What is the complement of 60° (in degrees)?
  7. 7.Two angles are complementary. One is 52° more than the other. What is the bigger angle (in degrees)?
  8. 8.What is the complement of 31° (in degrees)?
  9. 9.Two straight lines cross each other. One of the angles formed is 136°. What is the angle vertically opposite to it (in degrees)?
  10. 10.Two straight lines cross each other. One of the angles formed is 30°. What is the angle next to it on the same line (in degrees)?
  11. 11.Two angles are supplementary. One is 126° more than the other. What is the bigger angle (in degrees)?
  12. 12.Two angles are supplementary. One is 80° more than the other. What is the bigger angle (in degrees)?
  13. 13.Two angles are complementary. One is 18° more than the other. What is the bigger angle (in degrees)?
  14. 14.Are 36° and 90° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  15. 15.What is the complement of 39° (in degrees)?
  16. 16.Two straight lines cross each other. One of the angles formed is 102°. What is the angle vertically opposite to it (in degrees)?
  17. 17.Two parallel lines are cut by a transversal. One angle is 133°. What is its corresponding angle (in degrees)?
  18. 18.Two straight lines cross each other. One of the angles formed is 99°. What is the angle vertically opposite to it (in degrees)?
  19. 19.Two straight lines cross each other. One of the angles formed is 47°. 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 31°. What is the angle next to it on the same line (in degrees)?
  21. 21.What is the complement of 19° (in degrees)?
  22. 22.Two parallel lines are cut by a transversal. One interior angle is 36°. What is its alternate interior angle (in degrees)?
  23. 23.Two angles are complementary. One is 10° more than the other. What is the bigger angle (in degrees)?
  24. 24.What is the supplement of 168° (in degrees)?
  25. 25.Two parallel lines are cut by a transversal. One angle is 74°. What is its corresponding angle (in degrees)?
  26. 26.What is the complement of 33° (in degrees)?
  27. 27.What is the complement of 49° (in degrees)?
  28. 28.Are 73° and 17° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  29. 29.Are 18° and 126° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  30. 30.Two straight lines cross each other. One of the angles formed is 97°. What is the angle vertically opposite to it (in degrees)?
  31. 31.Two angles are complementary. One is 14° more than the other. What is the bigger angle (in degrees)?
  32. 32.What is the supplement of 88° (in degrees)?
  33. 33.Two parallel lines are cut by a transversal. One interior angle is 132°. 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 25°. What is the angle next to it on the same line (in degrees)?
  35. 35.Two parallel lines are cut by a transversal. One interior angle is 126°. What is its alternate interior angle (in degrees)?
  36. 36.What is the complement of 21° (in degrees)?
  37. 37.Two angles are complementary. One is 50° more than the other. What is the bigger angle (in degrees)?
  38. 38.Two angles are supplementary. One is 70° more than the other. What is the bigger angle (in degrees)?
  39. 39.Two parallel lines are cut by a transversal. One angle is 56°. What is its corresponding angle (in degrees)?
  40. 40.What is the supplement of 125° (in degrees)?

Answer key

  1. 65
  2. 80
  3. 10
  4. Supplementary
  5. 73
  6. 30
  7. 71
  8. 59
  9. 136
  10. 150
  11. 153
  12. 130
  13. 54
  14. Neither
  15. 51
  16. 102
  17. 133
  18. 99
  19. 133
  20. 149
  21. 71
  22. 36
  23. 50
  24. 12
  25. 74
  26. 57
  27. 41
  28. Complementary
  29. Neither
  30. 97
  31. 52
  32. 92
  33. 48
  34. 155
  35. 126
  36. 69
  37. 70
  38. 125
  39. 56
  40. 55

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