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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 923 · 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 134°. What is the angle vertically opposite to it (in degrees)?
  2. 2.Are 39° and 141° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  3. 3.What is the complement of 21° (in degrees)?
  4. 4.Are 61° and 119° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  5. 5.Are 65° and 5° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  6. 6.Two angles are complementary. One is 66° more than the other. What is the bigger angle (in degrees)?
  7. 7.What is the supplement of 165° (in degrees)?
  8. 8.Two angles are supplementary. One is 10° more than the other. What is the bigger angle (in degrees)?
  9. 9.What is the complement of 14° (in degrees)?
  10. 10.What is the complement of 58° (in degrees)?
  11. 11.Two angles are complementary. One is 10° more than the other. What is the bigger angle (in degrees)?
  12. 12.What is the supplement of 39° (in degrees)?
  13. 13.What is the supplement of 19° (in degrees)?
  14. 14.What is the supplement of 26° (in degrees)?
  15. 15.Two angles are complementary. One is 56° more than the other. What is the bigger angle (in degrees)?
  16. 16.What is the complement of 47° (in degrees)?
  17. 17.What is the supplement of 126° (in degrees)?
  18. 18.Two angles are complementary. One is 46° more than the other. What is the bigger angle (in degrees)?
  19. 19.What is the supplement of 135° (in degrees)?
  20. 20.What is the supplement of 95° (in degrees)?
  21. 21.Are 15° and 75° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  22. 22.What is the complement of 19° (in degrees)?
  23. 23.What is the complement of 79° (in degrees)?
  24. 24.What is the complement of 25° (in degrees)?
  25. 25.Are 37° and 53° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  26. 26.Two straight lines cross each other. One of the angles formed is 144°. What is the angle vertically opposite to it (in degrees)?
  27. 27.Two straight lines cross each other. One of the angles formed is 83°. What is the angle next to it on the same line (in degrees)?
  28. 28.Two parallel lines are cut by a transversal. One interior angle is 137°. What is its other interior angle on the same side of the transversal (in degrees)?
  29. 29.What is the complement of 29° (in degrees)?
  30. 30.What is the supplement of 8° (in degrees)?
  31. 31.Two straight lines cross each other. One of the angles formed is 101°. What is the angle next to it on the same line (in degrees)?
  32. 32.Two angles are supplementary. One is 74° more than the other. What is the bigger angle (in degrees)?
  33. 33.Are 28° and 11° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  34. 34.Two straight lines cross each other. One of the angles formed is 128°. What is the angle vertically opposite to it (in degrees)?
  35. 35.Two straight lines cross each other. One of the angles formed is 68°. What is the angle next to it on the same line (in degrees)?
  36. 36.What is the complement of 76° (in degrees)?
  37. 37.Two straight lines cross each other. One of the angles formed is 62°. What is the angle next to it on the same line (in degrees)?
  38. 38.Are 57° and 20° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  39. 39.Two angles are complementary. One is 26° more than the other. What is the bigger angle (in degrees)?
  40. 40.Two straight lines cross each other. One of the angles formed is 21°. What is the angle vertically opposite to it (in degrees)?

Answer key

  1. 134
  2. Supplementary
  3. 69
  4. Supplementary
  5. Neither
  6. 78
  7. 15
  8. 95
  9. 76
  10. 32
  11. 50
  12. 141
  13. 161
  14. 154
  15. 73
  16. 43
  17. 54
  18. 68
  19. 45
  20. 85
  21. Complementary
  22. 71
  23. 11
  24. 65
  25. Complementary
  26. 144
  27. 97
  28. 43
  29. 61
  30. 172
  31. 79
  32. 127
  33. Neither
  34. 128
  35. 112
  36. 14
  37. 118
  38. Neither
  39. 58
  40. 21

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