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.

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

 
 
 
 

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

 
 
 
 

4.

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

7.

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

 
 
 
 

8.

In the given figure, find the value of y.

 
 
 
 

9.

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

 
 
 
 

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

 
 
 
 

11.

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

 
 
 
 

12.

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

 
 
 
 

13.

In the given figure, find the value of x.

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

Indicate the correct option.

 
 
 
 

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

 
 
 
 

19.

In the given figure, find the value x.

 
 
 
 

20.

Check whether the following statements are true or not?

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

 
 
 
 

21.

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

 
 
 
 

22.

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?

 
 
 
 

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

 
 
 
 

24. From the given figure, find ∠ACD

 
 
 
 

25.

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

 
 
 
 

26.

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

 
 
 
 

27.

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

 
 
 
 

28.

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

 
 
 
 

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, line l || line m || line n, line p and line q are transversals . Then , measurement of ∠ x is

 
 
 
 

31.

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

Question 1 of 33