Lines and Angles Class 9 MCQs Questions with Answers

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

2. 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

3. A straight angle is equal to:

4. 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

5. Intersecting lines cut each other at:

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

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

8. A reflex angle is:

9. A line joining two endpoints is called

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

11. 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

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

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

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

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

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

17. Each angle of an equilateral triangle is

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

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

20. An acute angle is: