Lines and Angles Class 9 MCQs Questions with Answers

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

2. An acute angle is:

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

4. If one angle of triangle is equal to the sum of the other two, then the triangle 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. In the given figure, , if AB || CD || EF, PQ || RS, ∠RQD = 25° and ∠CQP = 60°, then ∠QRS is equal to

8. A line joining two endpoints is called

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

10. 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

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

12. A reflex angle is:

13. Each angle of an equilateral triangle is

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

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

16. Intersecting lines cut each other at:

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

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

19. A straight angle is equal to:

20. 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