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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 570 · 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 99°. What is the angle vertically opposite to it (in degrees)?
  3. 3.Are 73° and 17° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  4. 4.What is the complement of 26° (in degrees)?
  5. 5.What is the complement of 14° (in degrees)?
  6. 6.Two parallel lines are cut by a transversal. One interior angle is 143°. What is its other interior angle on the same side of the transversal (in degrees)?
  7. 7.What is the supplement of 155° (in degrees)?
  8. 8.What is the supplement of 158° (in degrees)?
  9. 9.What is the supplement of 167° (in degrees)?
  10. 10.Two parallel lines are cut by a transversal. One interior angle is 137°. What is its alternate interior angle (in degrees)?
  11. 11.Two straight lines cross each other. One of the angles formed is 132°. What is the angle vertically opposite to it (in degrees)?
  12. 12.Are 19° and 49° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  13. 13.Two angles are complementary. One is 40° more than the other. What is the bigger angle (in degrees)?
  14. 14.Two straight lines cross each other. One of the angles formed is 108°. What is the angle vertically opposite to it (in degrees)?
  15. 15.What is the complement of 37° (in degrees)?
  16. 16.What is the complement of 76° (in degrees)?
  17. 17.Are 71° and 19° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  18. 18.What is the complement of 29° (in degrees)?
  19. 19.Are 79° and 11° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  20. 20.Two angles are complementary. One is 42° more than the other. What is the bigger angle (in degrees)?
  21. 21.Two straight lines cross each other. One of the angles formed is 144°. What is the angle next to it on the same line (in degrees)?
  22. 22.What is the supplement of 144° (in degrees)?
  23. 23.Are 31° and 59° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  24. 24.What is the supplement of 67° (in degrees)?
  25. 25.What is the supplement of 91° (in degrees)?
  26. 26.What is the supplement of 148° (in degrees)?
  27. 27.Two parallel lines are cut by a transversal. One interior angle is 100°. What is its other interior angle on the same side of the transversal (in degrees)?
  28. 28.What is the supplement of 135° (in degrees)?
  29. 29.What is the supplement of 125° (in degrees)?
  30. 30.Two straight lines cross each other. One of the angles formed is 155°. What is the angle vertically opposite to it (in degrees)?
  31. 31.What is the supplement of 38° (in degrees)?
  32. 32.Are 18° and 101° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  33. 33.What is the supplement of 46° (in degrees)?
  34. 34.Two angles are complementary. One is 8° more than the other. What is the bigger angle (in degrees)?
  35. 35.What is the supplement of 140° (in degrees)?
  36. 36.Two parallel lines are cut by a transversal. One angle is 90°. What is its corresponding angle (in degrees)?
  37. 37.Two parallel lines are cut by a transversal. One interior angle is 39°. What is its other interior angle on the same side of the transversal (in degrees)?
  38. 38.What is the complement of 28° (in degrees)?
  39. 39.Two parallel lines are cut by a transversal. One angle is 146°. What is its corresponding angle (in degrees)?
  40. 40.Are 33° and 155° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary

Answer key

  1. 65
  2. 99
  3. Complementary
  4. 64
  5. 76
  6. 37
  7. 25
  8. 22
  9. 13
  10. 137
  11. 132
  12. Neither
  13. 65
  14. 108
  15. 53
  16. 14
  17. Complementary
  18. 61
  19. Complementary
  20. 66
  21. 36
  22. 36
  23. Complementary
  24. 113
  25. 89
  26. 32
  27. 80
  28. 45
  29. 55
  30. 155
  31. 142
  32. Neither
  33. 134
  34. 49
  35. 40
  36. 90
  37. 141
  38. 62
  39. 146
  40. Neither

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