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Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 608 · 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 angles are supplementary. One is 130° more than the other. What is the bigger angle (in degrees)?
  3. 3.What is the complement of 44° (in degrees)?
  4. 4.What is the complement of 55° (in degrees)?
  5. 5.Two angles are complementary. One is 68° more than the other. What is the bigger angle (in degrees)?
  6. 6.What is the supplement of 55° (in degrees)?
  7. 7.Two straight lines cross each other. One of the angles formed is 100°. What is the angle vertically opposite to it (in degrees)?
  8. 8.Two straight lines cross each other. One of the angles formed is 120°. What is the angle vertically opposite to it (in degrees)?
  9. 9.What is the complement of 30° (in degrees)?
  10. 10.Are 23° and 100° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  11. 11.Two angles are supplementary. One is 48° more than the other. What is the bigger angle (in degrees)?
  12. 12.Two straight lines cross each other. One of the angles formed is 64°. What is the angle vertically opposite to it (in degrees)?
  13. 13.Are 55° and 35° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  14. 14.Are 52° and 118° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  15. 15.What is the supplement of 91° (in degrees)?
  16. 16.What is the supplement of 33° (in degrees)?
  17. 17.What is the supplement of 20° (in degrees)?
  18. 18.What is the complement of 65° (in degrees)?
  19. 19.What is the complement of 56° (in degrees)?
  20. 20.Are 31° and 17° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  21. 21.What is the supplement of 107° (in degrees)?
  22. 22.What is the complement of 18° (in degrees)?
  23. 23.Two angles are supplementary. One is 98° more than the other. What is the bigger angle (in degrees)?
  24. 24.What is the complement of 83° (in degrees)?
  25. 25.Two parallel lines are cut by a transversal. One interior angle is 110°. What is its other interior angle on the same side of the transversal (in degrees)?
  26. 26.Two parallel lines are cut by a transversal. One angle is 148°. What is its corresponding angle (in degrees)?
  27. 27.Are 20° and 109° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
  28. 28.Two angles are complementary. One is 70° more than the other. What is the bigger angle (in degrees)?
  29. 29.Two angles are supplementary. One is 72° more than the other. What is the bigger angle (in degrees)?
  30. 30.What is the supplement of 155° (in degrees)?
  31. 31.What is the complement of 57° (in degrees)?
  32. 32.Two parallel lines are cut by a transversal. One angle is 96°. What is its corresponding angle (in degrees)?
  33. 33.Are 16° and 164° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
  34. 34.What is the complement of 60° (in degrees)?
  35. 35.Are 25° and 74° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
  36. 36.Two straight lines cross each other. One of the angles formed is 69°. What is the angle next to it on the same line (in degrees)?
  37. 37.Two angles are complementary. One is 30° more than the other. What is the bigger angle (in degrees)?
  38. 38.Are 39° and 141° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
  39. 39.Two straight lines cross each other. One of the angles formed is 70°. What is the angle vertically opposite to it (in degrees)?
  40. 40.What is the complement of 80° (in degrees)?

Answer key

  1. 65
  2. 155
  3. 46
  4. 35
  5. 79
  6. 125
  7. 100
  8. 120
  9. 60
  10. Neither
  11. 114
  12. 64
  13. Complementary
  14. Neither
  15. 89
  16. 147
  17. 160
  18. 25
  19. 34
  20. Neither
  21. 73
  22. 72
  23. 139
  24. 7
  25. 70
  26. 148
  27. Neither
  28. 80
  29. 126
  30. 25
  31. 33
  32. 96
  33. Supplementary
  34. 30
  35. Neither
  36. 111
  37. 60
  38. Supplementary
  39. 70
  40. 10

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