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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 561 · 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.What is the complement of 18° (in degrees)?
  3. 3.What is the supplement of 43° (in degrees)?
  4. 4.What is the supplement of 11° (in degrees)?
  5. 5.Two straight lines cross each other. One of the angles formed is 160°. What is the angle vertically opposite to it (in degrees)?
  6. 6.Two angles are supplementary. One is 118° more than the other. What is the bigger angle (in degrees)?
  7. 7.Two angles are supplementary. One is 40° more than the other. What is the bigger angle (in degrees)?
  8. 8.What is the supplement of 82° (in degrees)?
  9. 9.Two straight lines cross each other. One of the angles formed is 59°. What is the angle vertically opposite to it (in degrees)?
  10. 10.Two parallel lines are cut by a transversal. One angle is 115°. What is its corresponding angle (in degrees)?
  11. 11.Two parallel lines are cut by a transversal. One angle is 139°. What is its corresponding angle (in degrees)?
  12. 12.Two straight lines cross each other. One of the angles formed is 21°. What is the angle next to it on the same line (in degrees)?
  13. 13.Are 53° and 127° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  14. 14.Two straight lines cross each other. One of the angles formed is 127°. What is the angle vertically opposite to it (in degrees)?
  15. 15.What is the complement of 62° (in degrees)?
  16. 16.Are 36° and 54° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  17. 17.Two angles are complementary. One is 22° more than the other. What is the bigger angle (in degrees)?
  18. 18.What is the supplement of 141° (in degrees)?
  19. 19.Two angles are complementary. One is 62° more than the other. What is the bigger angle (in degrees)?
  20. 20.Are 60° and 128° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  21. 21.What is the complement of 16° (in degrees)?
  22. 22.What is the complement of 32° (in degrees)?
  23. 23.Two angles are complementary. One is 24° more than the other. What is the bigger angle (in degrees)?
  24. 24.Two angles are supplementary. One is 66° more than the other. What is the bigger angle (in degrees)?
  25. 25.Two angles are supplementary. One is 130° more than the other. What is the bigger angle (in degrees)?
  26. 26.Two parallel lines are cut by a transversal. One angle is 120°. What is its corresponding angle (in degrees)?
  27. 27.Two angles are complementary. One is 46° more than the other. What is the bigger angle (in degrees)?
  28. 28.Two angles are supplementary. One is 134° more than the other. What is the bigger angle (in degrees)?
  29. 29.What is the supplement of 166° (in degrees)?
  30. 30.What is the supplement of 29° (in degrees)?
  31. 31.What is the complement of 75° (in degrees)?
  32. 32.What is the supplement of 49° (in degrees)?
  33. 33.What is the complement of 11° (in degrees)?
  34. 34.What is the supplement of 99° (in degrees)?
  35. 35.What is the complement of 14° (in degrees)?
  36. 36.Two straight lines cross each other. One of the angles formed is 132°. What is the angle next to it on the same line (in degrees)?
  37. 37.What is the complement of 21° (in degrees)?
  38. 38.Are 78° and 125° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  39. 39.Are 45° and 79° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  40. 40.Two straight lines cross each other. One of the angles formed is 113°. What is the angle next to it on the same line (in degrees)?

Answer key

  1. 65
  2. 72
  3. 137
  4. 169
  5. 160
  6. 149
  7. 110
  8. 98
  9. 59
  10. 115
  11. 139
  12. 159
  13. Supplementary
  14. 127
  15. 28
  16. Complementary
  17. 56
  18. 39
  19. 76
  20. Neither
  21. 74
  22. 58
  23. 57
  24. 123
  25. 155
  26. 120
  27. 68
  28. 157
  29. 14
  30. 151
  31. 15
  32. 131
  33. 79
  34. 81
  35. 76
  36. 48
  37. 69
  38. Neither
  39. Neither
  40. 67

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