Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 81 · 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.What is the complement of 9° (in degrees)?
2. 2.What is the supplement of 169° (in degrees)?
3. 3.Two straight lines cross each other. One of the angles formed is 51°. What is the angle next to it on the same line (in degrees)?
4. 4.What is the complement of 71° (in degrees)?
5. 5.Two angles are complementary. One is 24° more than the other. What is the bigger angle (in degrees)?
6. 6.What is the supplement of 114° (in degrees)?
7. 7.Two angles are supplementary. One is 22° more than the other. What is the bigger angle (in degrees)?
8. 8.Are 40° and 50° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
9. 9.What is the supplement of 33° (in degrees)?
10. 10.Two angles are complementary. One is 26° more than the other. What is the bigger angle (in degrees)?
11. 11.Two straight lines cross each other. One of the angles formed is 52°. What is the angle next to it on the same line (in degrees)?
12. 12.Are 47° and 40° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
13. 13.What is the complement of 80° (in degrees)?
14. 14.What is the supplement of 19° (in degrees)?
15. 15.What is the supplement of 69° (in degrees)?
16. 16.What is the supplement of 18° (in degrees)?
17. 17.What is the complement of 68° (in degrees)?
18. 18.Two straight lines cross each other. One of the angles formed is 104°. What is the angle vertically opposite to it (in degrees)?
19. 19.Two angles are supplementary. One is 118° more than the other. What is the bigger angle (in degrees)?
20. 20.What is the supplement of 137° (in degrees)?
21. 21.What is the complement of 48° (in degrees)?
22. 22.Are 70° and 20° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
23. 23.What is the complement of 12° (in degrees)?
24. 24.Two straight lines cross each other. One of the angles formed is 39°. What is the angle vertically opposite to it (in degrees)?
25. 25.Two straight lines cross each other. One of the angles formed is 67°. What is the angle next to it on the same line (in degrees)?
26. 26.Two straight lines cross each other. One of the angles formed is 58°. What is the angle vertically opposite to it (in degrees)?
27. 27.What is the complement of 34° (in degrees)?
28. 28.What is the complement of 22° (in degrees)?
29. 29.Are 75° and 15° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
30. 30.What is the complement of 59° (in degrees)?
31. 31.Two parallel lines are cut by a transversal. One angle is 133°. What is its corresponding angle (in degrees)?
32. 32.Two straight lines cross each other. One of the angles formed is 43°. What is the angle next to it on the same line (in degrees)?
33. 33.What is the supplement of 98° (in degrees)?
34. 34.What is the complement of 26° (in degrees)?
35. 35.What is the supplement of 16° (in degrees)?
36. 36.What is the complement of 62° (in degrees)?
37. 37.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)?
38. 38.Two straight lines cross each other. One of the angles formed is 83°. What is the angle next to it on the same line (in degrees)?
39. 39.What is the supplement of 76° (in degrees)?
40. 40.Two angles are complementary. One is 36° more than the other. What is the bigger angle (in degrees)?

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