Lines and Angles Class 9 Worksheet

# Lines and Angles Class 9 Worksheet

Lines and Angles Class 9 Worksheets help to assess yourself.

## Lines and Angles Class 9 Worksheet with Answers

1. If the complement of an angle is equal to the supplement of four times the angle, then find the measure of the angle.

2. In a Î”ABC, A + B = 110°, C + A = 135°. Find A.

3. In the given figure, what value of x will make AOB a line?

4. In the given figure, AB II ED, find x.

5. Determine the value of x in the given figure if AB II CD II EF.

6. In a triangle, if 4A = 3B = 12C, find all the angles.

7. The angles of a triangle are in the ratio 3 : 7 : 8. Find the angles of the triangle.

8. In the given figure, l II m. Show that 1 + 2 – 3 = 180°.

9. In the given figure, find the value of x.

10. Find x, if AB II CD II EF.

11. If a transversal cuts two parallel straight lines and is perpendicular to one of them, show that it will be perpendicular to the other line also.

12. If two parallel lines are intersected by a transversal, show that the bisectors of any corresponding angles are parallel.

13. If two lines are intersected in such a way that the bisectors of a pair of corresponding angles are parallel, show that the given lines are parallel to each other.

14. Prove that the bisectors of a pair of alternate angles of two lines are parallel.

15. In the given figure, TU II SR and TR II SV, then find a and b.

16. In the given figure, prove that P + Q + R + S + T is equal to two right angles.

17. In the given figure, bisector of B and D of a quadrilateral ABCD meet CD and AB produced at P and Q respectively. Prove that P + Q = (ABC + ADC)/2.

1. 30°               2. 65°

3. 30°               4. 26°

5. a. 110°        b. 140°

6. 67.5°, 90°, 22.5°

7. 30°, 70°, 80°

8. Do it yourself

9. 109°            10. 20°

11. Do it yourself

12. Do it yourself

13. Do it yourself

14. Do it yourself

15. a = 115°; b = 40°

16. Do it yourself

17. Do it yourself

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