Lines and Angles Class 9 MCQs Questions with Answers

1. A straight angle is equal to:

2. If two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2 : 3, then the greater of the two angles is

3. In the given figure, POQ is a line. The value of x is

4. An exterior angle of a triangle is 105° and its two interior opposite angles are equal. Each of these equal angles is

5. One of the angles of a triangle is 75°. If the difference of other two is 35°, then the largest angle of other two angles has a measure

6. Angles of a triangle are in the ratio 2: 4 : 3. The smallest angle of the triangle is

7. A line joining two endpoints is called

8. Two angles whose sum is equal to 180° are called:

9. Intersecting lines cut each other at:

10. In ΔABC, the bisectors of ∠ABC and ∠BCA intersect each other at O. The measure of ∠BOC is

11. An acute angle is:

12. The angle of a triangle are in the ratio 5 : 3 : 7, the triangle is

13. If one angle of triangle is equal to the sum of the other two, then the triangle is

14. In the given figure, , if AB || CD || EF, PQ || RS, ∠RQD = 25° and ∠CQP = 60°, then ∠QRS is equal to

15. If one of the angles of a triangle is 130°, then the angle between the bisectors of the other two angles can be 

16. If two lines intersect each other, then the vertically opposite angles are:

17. In the given figure, if OP||RS, ∠OPQ = 110° and ∠QRS = 130°, then ∠PQR is equal to

18. An exterior angle of a triangle is 80° and the interior opposite angles are in the ratio 1 : 3, measure of interior opposite angles are

19. Each angle of an equilateral triangle is

20. A reflex angle is: