Prepare for your Class 9 Maths exams with our Lines and Angles mock tests designed according to the latest CBSE syllabus. These online tests help students strengthen their understanding of key concepts such as complementary and supplementary angles, linear pairs, vertically opposite angles, and properties of parallel lines. Each mock test includes detailed solutions, instant feedback, and performance analysis to help you identify weak areas and improve your problem-solving speed. Perfect for Class 9 students aiming to score high in school exams and board-level assessments.

1. In figure if x : y = 1 : 4, then values of x and y are respectively

 
 
 
 

2. Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark  the correct choice as:

Assertion (A): If two angles of a triangle measure 50° and 60°, its third angle, is 70°.
Reason (R): The sum of the angles of a triangle is 180°

 
 
 
 

3. Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark  the correct choice as:

Assertion (A): If angles ‘a’ and ‘b’ form a linear pair of angles and a = 40°, then b = 140°.
Reason (R): Sum of linear pair of angles is always 180°.

 
 
 
 

4. If the difference between two complementary angles is 10°, then the angles are

 
 
 
 

5. In the given figure, a pair of adjacent angles is

 
 
 
 

6. In the given figure, ∠4 and ∠5 are known as

 
 
 
 

7. In the given figure, if ∠AOC = 50°, then (∠AOD + ∠COB) is equal to

 
 
 
 

8. In the given figure, value of x is

 
 
 
 

9. In the given figures, which pair of angles form adjacent complementary angles?

 
 
 
 

10. In the given figure, the relation between line l and line m is

 
 
 
 

11. Line l is perpendicular to line m and line m is perpendicular to line n, the line l is _________ to line n.

 
 
 
 

12. In the given figure, ∠x is

 
 
 
 

13. In the given figure, PQ || RS and ∠ACS = 127°, ∠BAC is

 
 
 
 

14.

 
 

15. In the given figure, l||m||n. Then value of x is

 
 
 
 

16.

Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark  the correct choice as:

Assertion (A): If the side BC of DABC is produced to D, then ∠ACD = ∠A + ∠B.
Reason (R): Exterior angle is the sum of two interior angles.

 
 
 
 

17. Number of triangles which can be drawn with angles 42°, 65° and 74° are

 
 
 
 

18. In the given figure, PQ || RS and ∠ACS = 127°, ∠BAC is

 
 
 
 

19. In the given figure, ∠1 = ∠2 then the measurements of ∠3 and ∠4 respectively are

 
 
 
 

20. In the given figure, ∠2 and ∠8 are known as

 
 
 
 

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

 
 
 
 

22.

Direction: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark  the correct choice as:

Assertion (A): If a ray  stands on a line , such that ∠ACD = ∠BCD, then ∠ACD = 45°.
Reason (R): If a ray  stands on a line  then ∠ACD + ∠BCD = 180°.

 
 
 
 

23. In the given figure, ∠x is

 
 
 
 

24. What is common between the three angles of a triangle and a linear pair axiom?

 
 
 
 

25. In figure, AB || ED, the value of x is

 
 
 
 

26. In the given figure, measure of ∠QPR is

 
 
 
 

27. Diagonals of a rhombus ABCD intersect each other at O, then, what are the measurements of vertically opposite angles ∠AOB and ∠COD ?

 
 
 
 

28. In the given figure, POS is a line, then ∠QOR is

 
 
 
 

29. An angle is 20° more than three times the given angle. If the two angles are supplementary, then the angles are

 
 
 
 

30.

 In the given figure, AB || CD, the value of x is

 
 
 
 

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