Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 153 · 40 sums

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.

1. 1.Two straight lines cross each other. One of the angles formed is 79°. What is the angle next to it on the same line (in degrees)?
2. 2.What is the complement of 51° (in degrees)?
3. 3.What is the complement of 33° (in degrees)?
4. 4.What is the supplement of 14° (in degrees)?
5. 5.What is the supplement of 57° (in degrees)?
6. 6.What is the supplement of 107° (in degrees)?
7. 7.What is the supplement of 97° (in degrees)?
8. 8.Two straight lines cross each other. One of the angles formed is 68°. What is the angle vertically opposite to it (in degrees)?
9. 9.Two angles are complementary. One is 4° more than the other. What is the bigger angle (in degrees)?
10. 10.What is the supplement of 159° (in degrees)?
11. 11.Two straight lines cross each other. One of the angles formed is 56°. What is the angle next to it on the same line (in degrees)?
12. 12.What is the supplement of 155° (in degrees)?
13. 13.Two straight lines cross each other. One of the angles formed is 108°. What is the angle next to it on the same line (in degrees)?
14. 14.Two parallel lines are cut by a transversal. One interior angle is 99°. What is its alternate interior angle (in degrees)?
15. 15.What is the supplement of 170° (in degrees)?
16. 16.What is the complement of 70° (in degrees)?
17. 17.Are 17° and 73° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
18. 18.What is the supplement of 154° (in degrees)?
19. 19.What is the supplement of 49° (in degrees)?
20. 20.Two angles are complementary. One is 8° more than the other. What is the bigger angle (in degrees)?
21. 21.What is the supplement of 174° (in degrees)?
22. 22.What is the complement of 15° (in degrees)?
23. 23.Two angles are supplementary. One is 18° more than the other. What is the bigger angle (in degrees)?
24. 24.Are 40° and 170° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
25. 25.Two straight lines cross each other. One of the angles formed is 159°. What is the angle vertically opposite to it (in degrees)?
26. 26.Two parallel lines are cut by a transversal. One interior angle is 136°. What is its alternate interior angle (in degrees)?
27. 27.What is the supplement of 36° (in degrees)?
28. 28.Are 52° and 38° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
29. 29.What is the supplement of 91° (in degrees)?
30. 30.Two angles are supplementary. One is 108° more than the other. What is the bigger angle (in degrees)?
31. 31.What is the complement of 84° (in degrees)?
32. 32.What is the supplement of 99° (in degrees)?
33. 33.Two angles are supplementary. One is 10° more than the other. What is the bigger angle (in degrees)?
34. 34.Two parallel lines are cut by a transversal. One interior angle is 51°. What is its alternate interior angle (in degrees)?
35. 35.Two straight lines cross each other. One of the angles formed is 100°. What is the angle vertically opposite to it (in degrees)?
36. 36.What is the complement of 85° (in degrees)?
37. 37.What is the supplement of 44° (in degrees)?
38. 38.Are 42° and 138° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
39. 39.What is the supplement of 102° (in degrees)?
40. 40.Two parallel lines are cut by a transversal. One angle is 140°. What is its corresponding angle (in degrees)?

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