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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 248 · 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 28° (in degrees)?
  2. 2.Two angles are supplementary. One is 134° more than the other. What is the bigger angle (in degrees)?
  3. 3.Are 51° and 39° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  4. 4.Are 71° and 76° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  5. 5.Two straight lines cross each other. One of the angles formed is 74°. What is the angle vertically opposite to it (in degrees)?
  6. 6.What is the supplement of 125° (in degrees)?
  7. 7.What is the supplement of 99° (in degrees)?
  8. 8.What is the supplement of 22° (in degrees)?
  9. 9.What is the supplement of 42° (in degrees)?
  10. 10.Are 61° and 67° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  11. 11.Are 17° and 163° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  12. 12.Are 67° and 23° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  13. 13.Two angles are supplementary. One is 100° more than the other. What is the bigger angle (in degrees)?
  14. 14.Two angles are supplementary. One is 4° more than the other. What is the bigger angle (in degrees)?
  15. 15.Two angles are supplementary. One is 66° more than the other. What is the bigger angle (in degrees)?
  16. 16.Two straight lines cross each other. One of the angles formed is 40°. What is the angle vertically opposite to it (in degrees)?
  17. 17.What is the complement of 76° (in degrees)?
  18. 18.Two parallel lines are cut by a transversal. One angle is 117°. What is its corresponding angle (in degrees)?
  19. 19.Two angles are complementary. One is 20° more than the other. What is the bigger angle (in degrees)?
  20. 20.What is the supplement of 134° (in degrees)?
  21. 21.What is the supplement of 133° (in degrees)?
  22. 22.Two angles are complementary. One is 24° more than the other. What is the bigger angle (in degrees)?
  23. 23.What is the complement of 42° (in degrees)?
  24. 24.Two parallel lines are cut by a transversal. One angle is 140°. What is its corresponding angle (in degrees)?
  25. 25.What is the complement of 38° (in degrees)?
  26. 26.Are 49° and 128° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  27. 27.Two straight lines cross each other. One of the angles formed is 51°. What is the angle vertically opposite to it (in degrees)?
  28. 28.Two straight lines cross each other. One of the angles formed is 149°. What is the angle vertically opposite to it (in degrees)?
  29. 29.What is the supplement of 148° (in degrees)?
  30. 30.What is the supplement of 131° (in degrees)?
  31. 31.What is the supplement of 33° (in degrees)?
  32. 32.Are 40° and 28° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  33. 33.What is the complement of 51° (in degrees)?
  34. 34.What is the complement of 20° (in degrees)?
  35. 35.What is the complement of 79° (in degrees)?
  36. 36.Two parallel lines are cut by a transversal. One angle is 71°. What is its corresponding angle (in degrees)?
  37. 37.Are 30° and 160° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  38. 38.Are 36° and 54° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  39. 39.Two straight lines cross each other. One of the angles formed is 119°. What is the angle next to it on the same line (in degrees)?
  40. 40.What is the supplement of 17° (in degrees)?

Answer key

  1. 62
  2. 157
  3. Complementary
  4. Neither
  5. 74
  6. 55
  7. 81
  8. 158
  9. 138
  10. Neither
  11. Supplementary
  12. Complementary
  13. 140
  14. 92
  15. 123
  16. 40
  17. 14
  18. 117
  19. 55
  20. 46
  21. 47
  22. 57
  23. 48
  24. 140
  25. 52
  26. Neither
  27. 51
  28. 149
  29. 32
  30. 49
  31. 147
  32. Neither
  33. 39
  34. 70
  35. 11
  36. 71
  37. Neither
  38. Complementary
  39. 61
  40. 163

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