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Class 9 Mathematics: Triangles
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MCQs on triangles basics, triangle angle sum property, triangle congruence and its criteria, triangle properties and inequalities.

Class 9 Mathematics: Triangles
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25 Questions

1. Which among the following relation is correct if PO and RO are angle bisectors?
2. The sum of the angles of a triangle is equal to __________
3. Which of the following relation is correct if PQ = PS, PR = PT and ∠QPS = ∠TPR?
4. From the given diagram below, what can be said about two triangles ABC and PQR?
5. Find the angles (∠P, ∠Q, ∠R) of the triangle if a + b = 120° and a – c = 30°.
6. From the given diagram below, we can say that triangles ABC and PQR are congruent.
7. Find x if PQ || RS and MO and LO are angle bisectors.
8. From the given diagram, what can be said about sides AC and PC?
9. From the diagram given below, which of the following option is true?
10. From the following diagram, which of the following option is true?
11. Find the value of ∠ABD if AB = AC and DB = DC.
12. Identify the rule by which the following triangles are congruent.
13. Find the angle ∠SOR if PQ || RS and ∠OSR : ∠SRO = 2 : 3.
14. Which among the following is the shortest?
15. Find x if PQ || RS and ∠1 : ∠2 = 3 : 5.
16. What is the relation between ∠1 and ∠2 if AD = CD?
17. Which of the following option is correct if AD and PM are medians and are equal and AB = PQ and BC = QR?
18. From the diagram given below, we can say that ΔABC and ΔPQR are congruent.
19. Identify the correct relation if x : y : z = 1 : 3 : 5.
20. Identify the type of triangle if altitudes AD, BE and CF are equal.
21. Find the type of the ∆ ABC if angle B and C are equal.
22. Find the angle ∠BCD if AD || BC and x = 2y/3 and y = 3z/5.
23. From the diagram given below, what is the value of ∠CBA?
24. Which among the following statements are not correct?
25. Identify the correct relation among the following.

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