Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 948 · 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 122°. What is the angle vertically opposite to it (in degrees)?
2. 2.What is the complement of 51° (in degrees)?
3. 3.Two parallel lines are cut by a transversal. One interior angle is 123°. What is its alternate interior angle (in degrees)?
4. 4.Two straight lines cross each other. One of the angles formed is 74°. What is the angle vertically opposite to it (in degrees)?
5. 5.Are 72° and 18° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
6. 6.What is the supplement of 156° (in degrees)?
7. 7.What is the complement of 24° (in degrees)?
8. 8.Two angles are supplementary. One is 58° more than the other. What is the bigger angle (in degrees)?
9. 9.Two straight lines cross each other. One of the angles formed is 81°. What is the angle vertically opposite to it (in degrees)?
10. 10.Two parallel lines are cut by a transversal. One interior angle is 93°. What is its other interior angle on the same side of the transversal (in degrees)?
11. 11.Are 67° and 23° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
12. 12.Are 20° and 71° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
13. 13.Two parallel lines are cut by a transversal. One interior angle is 124°. What is its alternate interior angle (in degrees)?
14. 14.Two parallel lines are cut by a transversal. One interior angle is 49°. What is its other interior angle on the same side of the transversal (in degrees)?
15. 15.Two parallel lines are cut by a transversal. One interior angle is 43°. What is its other interior angle on the same side of the transversal (in degrees)?
16. 16.What is the complement of 9° (in degrees)?
17. 17.What is the supplement of 151° (in degrees)?
18. 18.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)?
19. 19.What is the complement of 49° (in degrees)?
20. 20.Two parallel lines are cut by a transversal. One angle is 149°. What is its corresponding angle (in degrees)?
21. 21.Are 25° and 49° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
22. 22.Two straight lines cross each other. One of the angles formed is 55°. What is the angle next to it on the same line (in degrees)?
23. 23.What is the complement of 77° (in degrees)?
24. 24.Are 70° and 53° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
25. 25.What is the complement of 52° (in degrees)?
26. 26.What is the complement of 14° (in degrees)?
27. 27.Two parallel lines are cut by a transversal. One interior angle is 30°. What is its alternate interior angle (in degrees)?
28. 28.Are 77° and 19° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
29. 29.Two angles are complementary. One is 32° more than the other. What is the bigger angle (in degrees)?
30. 30.Are 18° and 72° complementary, supplementary or neither? (a) Neither (b) Complementary (c) Supplementary
31. 31.Two angles are supplementary. One is 134° more than the other. What is the bigger angle (in degrees)?
32. 32.What is the complement of 84° (in degrees)?
33. 33.Two parallel lines are cut by a transversal. One angle is 116°. What is its corresponding angle (in degrees)?
34. 34.Two straight lines cross each other. One of the angles formed is 135°. What is the angle vertically opposite to it (in degrees)?
35. 35.Two angles are supplementary. One is 104° more than the other. What is the bigger angle (in degrees)?
36. 36.Are 69° and 21° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
37. 37.Two straight lines cross each other. One of the angles formed is 38°. What is the angle next to it on the same line (in degrees)?
38. 38.Are 12° and 168° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
39. 39.Are 38° and 29° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
40. 40.Two angles are complementary. One is 34° more than the other. What is the bigger angle (in degrees)?

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