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

 
 
 
 

2. From the given figure, find ∠ACD

 
 
 
 

3.

In the given figure, find the value x.

 
 
 
 

4.

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

 
 
 
 

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

 
 
 
 

6.

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

9.

In the given figure, find the value of x.

 
 
 
 

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

 
 
 
 

11.

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

15.

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

 
 
 
 

16.

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

 
 
 
 

17.

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

 
 
 
 

18.

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

 
 
 
 

19.

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?

 
 
 
 

20.

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

24.

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

 
 
 
 

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

Indicate the correct option.

 
 
 
 

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

 
 
 
 

27.

Check whether the following statements are true or not?

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

30.

In the given figure, find the value of y.

 
 
 
 

31.

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

 
 
 
 

32.

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

 
 
 
 

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

 
 
 
 

Question 1 of 33