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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 227 · 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 89° (in degrees)?
  2. 2.Two straight lines cross each other. One of the angles formed is 127°. What is the angle vertically opposite to it (in degrees)?
  3. 3.Two parallel lines are cut by a transversal. One interior angle is 37°. What is its alternate interior angle (in degrees)?
  4. 4.What is the supplement of 113° (in degrees)?
  5. 5.Two parallel lines are cut by a transversal. One interior angle is 38°. What is its other interior angle on the same side of the transversal (in degrees)?
  6. 6.What is the complement of 18° (in degrees)?
  7. 7.Are 26° and 64° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
  8. 8.Two parallel lines are cut by a transversal. One interior angle is 135°. What is its other interior angle on the same side of the transversal (in degrees)?
  9. 9.Are 16° and 74° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  10. 10.Two straight lines cross each other. One of the angles formed is 39°. What is the angle vertically opposite to it (in degrees)?
  11. 11.Two angles are supplementary. One is 10° more than the other. What is the bigger angle (in degrees)?
  12. 12.Are 20° and 70° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  13. 13.Two parallel lines are cut by a transversal. One interior angle is 144°. What is its other interior angle on the same side of the transversal (in degrees)?
  14. 14.Two straight lines cross each other. One of the angles formed is 60°. What is the angle vertically opposite to it (in degrees)?
  15. 15.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)?
  16. 16.What is the complement of 79° (in degrees)?
  17. 17.Two angles are supplementary. One is 90° more than the other. What is the bigger angle (in degrees)?
  18. 18.What is the complement of 74° (in degrees)?
  19. 19.Are 74° and 93° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  20. 20.What is the complement of 42° (in degrees)?
  21. 21.Two straight lines cross each other. One of the angles formed is 139°. What is the angle next to it on the same line (in degrees)?
  22. 22.Two straight lines cross each other. One of the angles formed is 63°. What is the angle next to it on the same line (in degrees)?
  23. 23.What is the supplement of 114° (in degrees)?
  24. 24.What is the supplement of 170° (in degrees)?
  25. 25.Are 52° and 38° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  26. 26.Two parallel lines are cut by a transversal. One interior angle is 86°. What is its other interior angle on the same side of the transversal (in degrees)?
  27. 27.What is the complement of 29° (in degrees)?
  28. 28.Are 67° and 137° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  29. 29.Two parallel lines are cut by a transversal. One angle is 65°. What is its corresponding angle (in degrees)?
  30. 30.Two straight lines cross each other. One of the angles formed is 119°. What is the angle vertically opposite to it (in degrees)?
  31. 31.What is the supplement of 168° (in degrees)?
  32. 32.What is the supplement of 128° (in degrees)?
  33. 33.Are 34° and 146° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  34. 34.Two parallel lines are cut by a transversal. One interior angle is 41°. What is its other interior angle on the same side of the transversal (in degrees)?
  35. 35.Two straight lines cross each other. One of the angles formed is 157°. What is the angle next to it on the same line (in degrees)?
  36. 36.Two straight lines cross each other. One of the angles formed is 88°. What is the angle vertically opposite to it (in degrees)?
  37. 37.Two straight lines cross each other. One of the angles formed is 24°. What is the angle vertically opposite to it (in degrees)?
  38. 38.Are 51° and 39° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
  39. 39.What is the supplement of 44° (in degrees)?
  40. 40.What is the supplement of 126° (in degrees)?

Answer key

  1. 91
  2. 127
  3. 37
  4. 67
  5. 142
  6. 72
  7. Complementary
  8. 45
  9. Complementary
  10. 39
  11. 95
  12. Complementary
  13. 36
  14. 60
  15. 37
  16. 11
  17. 135
  18. 16
  19. Neither
  20. 48
  21. 41
  22. 117
  23. 66
  24. 10
  25. Complementary
  26. 94
  27. 61
  28. Neither
  29. 65
  30. 119
  31. 12
  32. 52
  33. Supplementary
  34. 139
  35. 23
  36. 88
  37. 24
  38. Complementary
  39. 136
  40. 54

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