Class 7 Maths Worksheet: Lines and Angles

Maths worksheets lesson 52: Lines and angles · Set 10 · 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 50° (in degrees)?
2. 2.What is the supplement of 159° (in degrees)?
3. 3.What is the complement of 9° (in degrees)?
4. 4.What is the complement of 69° (in degrees)?
5. 5.What is the supplement of 163° (in degrees)?
6. 6.Two parallel lines are cut by a transversal. One interior angle is 35°. What is its other interior angle on the same side of the transversal (in degrees)?
7. 7.Two parallel lines are cut by a transversal. One angle is 145°. What is its corresponding angle (in degrees)?
8. 8.Two straight lines cross each other. One of the angles formed is 136°. What is the angle vertically opposite to it (in degrees)?
9. 9.What is the complement of 11° (in degrees)?
10. 10.Two parallel lines are cut by a transversal. One interior angle is 58°. What is its alternate interior angle (in degrees)?
11. 11.What is the complement of 63° (in degrees)?
12. 12.What is the complement of 7° (in degrees)?
13. 13.Are 17° and 163° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
14. 14.Two angles are complementary. One is 18° more than the other. What is the bigger angle (in degrees)?
15. 15.What is the supplement of 120° (in degrees)?
16. 16.What is the complement of 51° (in degrees)?
17. 17.What is the complement of 31° (in degrees)?
18. 18.What is the supplement of 48° (in degrees)?
19. 19.Are 12° and 158° complementary, supplementary or neither? (a) Complementary (b) Neither (c) Supplementary
20. 20.What is the supplement of 30° (in degrees)?
21. 21.What is the supplement of 74° (in degrees)?
22. 22.Two angles are supplementary. One is 112° more than the other. What is the bigger angle (in degrees)?
23. 23.What is the supplement of 99° (in degrees)?
24. 24.What is the supplement of 108° (in degrees)?
25. 25.What is the supplement of 38° (in degrees)?
26. 26.Are 39° and 51° complementary, supplementary or neither? (a) Neither (b) Supplementary (c) Complementary
27. 27.What is the complement of 25° (in degrees)?
28. 28.Are 47° and 43° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither
29. 29.Two angles are complementary. One is 12° more than the other. What is the bigger angle (in degrees)?
30. 30.What is the supplement of 148° (in degrees)?
31. 31.Two parallel lines are cut by a transversal. One interior angle is 98°. What is its other interior angle on the same side of the transversal (in degrees)?
32. 32.Two parallel lines are cut by a transversal. One interior angle is 54°. What is its other interior angle on the same side of the transversal (in degrees)?
33. 33.Two straight lines cross each other. One of the angles formed is 78°. What is the angle vertically opposite to it (in degrees)?
34. 34.What is the complement of 84° (in degrees)?
35. 35.Two straight lines cross each other. One of the angles formed is 51°. What is the angle vertically opposite to it (in degrees)?
36. 36.Two angles are complementary. One is 2° more than the other. What is the bigger angle (in degrees)?
37. 37.Two straight lines cross each other. One of the angles formed is 67°. What is the angle vertically opposite to it (in degrees)?
38. 38.Two parallel lines are cut by a transversal. One angle is 116°. What is its corresponding angle (in degrees)?
39. 39.Two straight lines cross each other. One of the angles formed is 137°. What is the angle vertically opposite to it (in degrees)?
40. 40.Are 55° and 111° complementary, supplementary or neither? (a) Supplementary (b) Complementary (c) Neither

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