Master the concepts of Lines and Angles with our Class 9 Maths online mock tests. Designed as per the latest CBSE syllabus, these tests cover all important topics including angle relationships, transversal lines, corresponding and alternate angles, and properties of triangles. Each test features chapter-specific MCQs with real-time scoring and detailed solutions to help students analyze their performance. Whether you’re revising for school exams or practicing for term assessments, these free mock tests make learning interactive, effective, and exam-ready.

1. In the given figure, ABCD is a rectangle in which ∠APB = 100°. The value of x is

 
 
 
 

2.

Check whether the following statements are true or not?

(I) a + b = d + c  (II) a + c + e = 180°  (III) b + f = c + e

 
 
 
 

3.

In the given figure, AOC and BOC form a linear pair. If b = 75°, find the value of angle a.

 
 
 
 

4.

In the given figure, if AOC = 50° then find the measure of (AOD + COB).

 
 
 
 

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

 
 
 
 

6.

Find the value of x for which AOB becomes a straight line in the given figure.

 
 
 
 

7. In the given figure, measure of ∠BOC is

 
 
 
 

8. In the given figures, which pair of angles represent a linear pair?

 
 
 
 

9.

In the given figure, find the value x.

 
 
 
 

10. In the given figure, if the angles x and y are in the ratio 2 : 3, then angle z is

 
 
 
 

11. In the given figure, line l || line m || line n, line p and line q are transversals . Then , measurement of ∠ x is

 
 
 
 

12. If two complementary angles are in the ratio 13 : 5, then the angles are

 
 
 
 

13.

The angle of a triangle ABC are in the ratio 2 : 3 : 4. Find the largest angle of the triangle.

 
 
 
 

14. Diagonals of a rectangle ABCD intersect at O. If ∠AOB = 70°, then ∠DCO is

 
 
 
 

15.

If the measure of an angle is thrice the measure of its supplementary angle, then find the measure of angle.

 
 
 
 

16.

In the given figure, if AOB is a line then find the measure of BOC, COD and DOA.

 
 
 
 

17.

In the given figure, find the value of y.

 
 
 
 

18.

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

 
 
 
 

19. From the given figure, find ∠ACD

 
 
 
 

20.

In the given figure, find the value of x.

 
 
 
 

21.

If a line l || m, n is a transversal in the given figure. Find the value of x.

 
 
 
 

22. In the given figure, measure of ∠BOC is

 
 
 
 

23. In the given figure, ∠x = 20°, ∠y = 160°, ∠w = 105°, ∠z = 75°.

Indicate the correct option.

 
 
 
 

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

 
 
 
 

25. The angles of a triangle are in the ratio 5 : 3 : 7. The triangle is

 
 
 
 

26.

In the given figure, p | | q. Find the value of x.

 
 
 
 

27.

Ray OD stands on line AOB. If ray OC and OE bisects BOD and AOD respectively. Find the COE.

 
 
 
 

28.

The measure of an angle is 8 times its complement. Find the angles.

 
 
 
 

29.

If a transversal intersects a pair of lines in such a way that a pair of alternate angles are equal, then what conclusion would you like to draw?

 
 
 
 

30.

In the given figure, if l | | m and a : b = 2 : 3 then find the value of y.

 
 
 
 

31. Two adjacent complementary angles are equal, then angles are

 
 
 
 

32. In the given figure, AB || DE, then measure of ∠ACD is

 
 
 
 

33. In the given figure, the value of x is

 
 
 
 

Question 1 of 33