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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 350 · 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 supplement of 171° (in degrees)?
  2. 2.What is the complement of 30° (in degrees)?
  3. 3.Two parallel lines are cut by a transversal. One interior angle is 115°. What is its other interior angle on the same side of the transversal (in degrees)?
  4. 4.What is the complement of 37° (in degrees)?
  5. 5.Two straight lines cross each other. One of the angles formed is 39°. What is the angle vertically opposite to it (in degrees)?
  6. 6.What is the complement of 38° (in degrees)?
  7. 7.What is the supplement of 33° (in degrees)?
  8. 8.What is the supplement of 123° (in degrees)?
  9. 9.What is the complement of 23° (in degrees)?
  10. 10.Two straight lines cross each other. One of the angles formed is 21°. What is the angle vertically opposite to it (in degrees)?
  11. 11.Are 13° and 57° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  12. 12.Two parallel lines are cut by a transversal. One angle is 52°. What is its corresponding angle (in degrees)?
  13. 13.Two straight lines cross each other. One of the angles formed is 65°. What is the angle next to it on the same line (in degrees)?
  14. 14.What is the complement of 8° (in degrees)?
  15. 15.What is the supplement of 138° (in degrees)?
  16. 16.What is the complement of 35° (in degrees)?
  17. 17.Are 32° and 128° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  18. 18.Two parallel lines are cut by a transversal. One interior angle is 88°. What is its other interior angle on the same side of the transversal (in degrees)?
  19. 19.What is the supplement of 82° (in degrees)?
  20. 20.Are 37° and 143° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  21. 21.Two straight lines cross each other. One of the angles formed is 50°. What is the angle vertically opposite to it (in degrees)?
  22. 22.What is the complement of 78° (in degrees)?
  23. 23.Two straight lines cross each other. One of the angles formed is 123°. What is the angle vertically opposite to it (in degrees)?
  24. 24.What is the complement of 61° (in degrees)?
  25. 25.Two parallel lines are cut by a transversal. One angle is 90°. What is its corresponding angle (in degrees)?
  26. 26.What is the complement of 83° (in degrees)?
  27. 27.What is the supplement of 91° (in degrees)?
  28. 28.What is the supplement of 39° (in degrees)?
  29. 29.What is the complement of 14° (in degrees)?
  30. 30.What is the supplement of 29° (in degrees)?
  31. 31.What is the supplement of 154° (in degrees)?
  32. 32.What is the complement of 18° (in degrees)?
  33. 33.What is the supplement of 131° (in degrees)?
  34. 34.What is the complement of 55° (in degrees)?
  35. 35.Are 40° and 21° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  36. 36.Two parallel lines are cut by a transversal. One interior angle is 44°. What is its other interior angle on the same side of the transversal (in degrees)?
  37. 37.What is the supplement of 44° (in degrees)?
  38. 38.Two parallel lines are cut by a transversal. One interior angle is 116°. What is its other interior angle on the same side of the transversal (in degrees)?
  39. 39.Are 57° and 80° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  40. 40.What is the complement of 25° (in degrees)?

Answer key

  1. 9
  2. 60
  3. 65
  4. 53
  5. 39
  6. 52
  7. 147
  8. 57
  9. 67
  10. 21
  11. Neither
  12. 52
  13. 115
  14. 82
  15. 42
  16. 55
  17. Neither
  18. 92
  19. 98
  20. Supplementary
  21. 50
  22. 12
  23. 123
  24. 29
  25. 90
  26. 7
  27. 89
  28. 141
  29. 76
  30. 151
  31. 26
  32. 72
  33. 49
  34. 35
  35. Neither
  36. 136
  37. 136
  38. 64
  39. Neither
  40. 65

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