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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 980 · 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.Are 76° and 104° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  2. 2.What is the complement of 55° (in degrees)?
  3. 3.Two straight lines cross each other. One of the angles formed is 149°. What is the angle vertically opposite to it (in degrees)?
  4. 4.Two straight lines cross each other. One of the angles formed is 25°. What is the angle next to it on the same line (in degrees)?
  5. 5.Two straight lines cross each other. One of the angles formed is 87°. What is the angle vertically opposite to it (in degrees)?
  6. 6.Two straight lines cross each other. One of the angles formed is 72°. What is the angle vertically opposite to it (in degrees)?
  7. 7.Two straight lines cross each other. One of the angles formed is 70°. What is the angle vertically opposite to it (in degrees)?
  8. 8.Two parallel lines are cut by a transversal. One interior angle is 70°. What is its other interior angle on the same side of the transversal (in degrees)?
  9. 9.Are 24° and 66° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  10. 10.Two parallel lines are cut by a transversal. One angle is 45°. What is its corresponding angle (in degrees)?
  11. 11.Two parallel lines are cut by a transversal. One angle is 144°. What is its corresponding angle (in degrees)?
  12. 12.Two straight lines cross each other. One of the angles formed is 111°. What is the angle next to it on the same line (in degrees)?
  13. 13.Two straight lines cross each other. One of the angles formed is 140°. What is the angle vertically opposite to it (in degrees)?
  14. 14.Two angles are supplementary. One is 120° more than the other. What is the bigger angle (in degrees)?
  15. 15.What is the supplement of 36° (in degrees)?
  16. 16.What is the supplement of 113° (in degrees)?
  17. 17.What is the complement of 78° (in degrees)?
  18. 18.What is the supplement of 34° (in degrees)?
  19. 19.What is the complement of 25° (in degrees)?
  20. 20.Are 38° and 26° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  21. 21.What is the supplement of 23° (in degrees)?
  22. 22.Two parallel lines are cut by a transversal. One angle is 56°. What is its corresponding angle (in degrees)?
  23. 23.What is the complement of 31° (in degrees)?
  24. 24.Two parallel lines are cut by a transversal. One interior angle is 74°. What is its alternate interior angle (in degrees)?
  25. 25.Two parallel lines are cut by a transversal. One interior angle is 59°. What is its other interior angle on the same side of the transversal (in degrees)?
  26. 26.Two straight lines cross each other. One of the angles formed is 127°. What is the angle next to it on the same line (in degrees)?
  27. 27.Are 22° and 158° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  28. 28.What is the supplement of 148° (in degrees)?
  29. 29.Are 11° and 92° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  30. 30.Are 11° and 79° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  31. 31.What is the complement of 28° (in degrees)?
  32. 32.What is the complement of 8° (in degrees)?
  33. 33.Two parallel lines are cut by a transversal. One angle is 84°. What is its corresponding angle (in degrees)?
  34. 34.What is the complement of 37° (in degrees)?
  35. 35.Two straight lines cross each other. One of the angles formed is 121°. What is the angle vertically opposite to it (in degrees)?
  36. 36.What is the supplement of 169° (in degrees)?
  37. 37.Are 52° and 128° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  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 12° and 68° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  40. 40.What is the complement of 44° (in degrees)?

Answer key

  1. Supplementary
  2. 35
  3. 149
  4. 155
  5. 87
  6. 72
  7. 70
  8. 110
  9. Complementary
  10. 45
  11. 144
  12. 69
  13. 140
  14. 150
  15. 144
  16. 67
  17. 12
  18. 146
  19. 65
  20. Neither
  21. 157
  22. 56
  23. 59
  24. 74
  25. 121
  26. 53
  27. Supplementary
  28. 32
  29. Neither
  30. Complementary
  31. 62
  32. 82
  33. 84
  34. 53
  35. 121
  36. 11
  37. Supplementary
  38. 64
  39. Neither
  40. 46

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