Lines and Angles Class 9 MCQs Questions with Answers

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

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

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

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

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

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

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

8. 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

9. Each angle of an equilateral triangle is

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

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

12. 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

13. Intersecting lines cut each other at:

14. 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

15. An acute angle is:

16. A straight angle is equal to:

17. A reflex angle is:

18. A line joining two endpoints is called

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

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