Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 311 · 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 90°. What is the angle vertically opposite to it (in degrees)?
2. 2.Two parallel lines are cut by a transversal. One interior angle is 97°. What is its other interior angle on the same side of the transversal (in degrees)?
3. 3.Two angles are complementary. One is 54° more than the other. What is the bigger angle (in degrees)?
4. 4.What is the complement of 52° (in degrees)?
5. 5.Are 48° and 42° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
6. 6.What is the supplement of 92° (in degrees)?
7. 7.Are 71° and 109° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
8. 8.What is the complement of 59° (in degrees)?
9. 9.What is the complement of 64° (in degrees)?
10. 10.What is the supplement of 85° (in degrees)?
11. 11.What is the complement of 76° (in degrees)?
12. 12.Two angles are supplementary. One is 30° more than the other. What is the bigger angle (in degrees)?
13. 13.Two angles are supplementary. One is 88° more than the other. What is the bigger angle (in degrees)?
14. 14.Two straight lines cross each other. One of the angles formed is 115°. What is the angle next to it on the same line (in degrees)?
15. 15.Are 63° and 31° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
16. 16.Two angles are supplementary. One is 138° more than the other. What is the bigger angle (in degrees)?
17. 17.What is the supplement of 63° (in degrees)?
18. 18.Two straight lines cross each other. One of the angles formed is 77°. What is the angle next to it on the same line (in degrees)?
19. 19.Two straight lines cross each other. One of the angles formed is 60°. What is the angle next to it on the same line (in degrees)?
20. 20.What is the complement of 63° (in degrees)?
21. 21.What is the supplement of 56° (in degrees)?
22. 22.What is the complement of 32° (in degrees)?
23. 23.What is the supplement of 58° (in degrees)?
24. 24.What is the supplement of 14° (in degrees)?
25. 25.Two angles are supplementary. One is 38° more than the other. What is the bigger angle (in degrees)?
26. 26.What is the complement of 75° (in degrees)?
27. 27.Are 41° and 82° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
28. 28.Two angles are supplementary. One is 140° more than the other. What is the bigger angle (in degrees)?
29. 29.What is the supplement of 50° (in degrees)?
30. 30.What is the complement of 5° (in degrees)?
31. 31.What is the supplement of 16° (in degrees)?
32. 32.Two straight lines cross each other. One of the angles formed is 37°. What is the angle next to it on the same line (in degrees)?
33. 33.Are 26° and 97° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
34. 34.Are 44° and 136° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
35. 35.Are 45° and 151° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
36. 36.What is the complement of 9° (in degrees)?
37. 37.What is the supplement of 7° (in degrees)?
38. 38.Two parallel lines are cut by a transversal. One interior angle is 39°. What is its alternate interior angle (in degrees)?
39. 39.Two angles are complementary. One is 36° more than the other. What is the bigger angle (in degrees)?
40. 40.What is the supplement of 98° (in degrees)?

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