Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 841 · 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.Are 40° and 50° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
2. 2.Are 58° and 32° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
3. 3.What is the supplement of 85° (in degrees)?
4. 4.What is the complement of 48° (in degrees)?
5. 5.Are 73° and 107° complementary, supplementary or neither? (a) Complementary (b) Supplementary (c) Neither
6. 6.What is the complement of 43° (in degrees)?
7. 7.Two angles are complementary. One is 8° more than the other. What is the bigger angle (in degrees)?
8. 8.Two parallel lines are cut by a transversal. One interior angle is 132°. What is its alternate interior angle (in degrees)?
9. 9.What is the supplement of 171° (in degrees)?
10. 10.What is the complement of 81° (in degrees)?
11. 11.What is the complement of 72° (in degrees)?
12. 12.What is the complement of 80° (in degrees)?
13. 13.What is the supplement of 128° (in degrees)?
14. 14.What is the complement of 47° (in degrees)?
15. 15.Two angles are supplementary. One is 18° more than the other. What is the bigger angle (in degrees)?
16. 16.What is the complement of 5° (in degrees)?
17. 17.What is the supplement of 58° (in degrees)?
18. 18.What is the supplement of 7° (in degrees)?
19. 19.What is the supplement of 173° (in degrees)?
20. 20.Two straight lines cross each other. One of the angles formed is 91°. What is the angle vertically opposite to it (in degrees)?
21. 21.What is the complement of 83° (in degrees)?
22. 22.Two straight lines cross each other. One of the angles formed is 156°. What is the angle next to it on the same line (in degrees)?
23. 23.Two straight lines cross each other. One of the angles formed is 32°. What is the angle next to it on the same line (in degrees)?
24. 24.Two straight lines cross each other. One of the angles formed is 145°. What is the angle vertically opposite to it (in degrees)?
25. 25.What is the supplement of 147° (in degrees)?
26. 26.Two parallel lines are cut by a transversal. One interior angle is 88°. What is its other interior angle on the same side of the transversal (in degrees)?
27. 27.Are 46° and 44° complementary, supplementary or neither? (a) Supplementary (b) Neither (c) Complementary
28. 28.Two straight lines cross each other. One of the angles formed is 35°. What is the angle next to it on the same line (in degrees)?
29. 29.What is the complement of 32° (in degrees)?
30. 30.What is the supplement of 31° (in degrees)?
31. 31.Are 22° and 109° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
32. 32.What is the supplement of 14° (in degrees)?
33. 33.What is the complement of 15° (in degrees)?
34. 34.What is the supplement of 149° (in degrees)?
35. 35.Two parallel lines are cut by a transversal. One interior angle is 60°. What is its alternate interior angle (in degrees)?
36. 36.What is the complement of 60° (in degrees)?
37. 37.What is the complement of 55° (in degrees)?
38. 38.What is the supplement of 50° (in degrees)?
39. 39.Are 80° and 100° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
40. 40.Are 80° and 153° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary

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