Triangles Class 9 MCQs Questions with Answers

1. The angles opposite to equal sides of a triangle are:

2. In figure X is a point in the interior of square ABCD, AXYZ is also a square. If DY = 3 cm and AZ = 2 cm, then find BY.

3. A triangle in which two sides are equal is called:

4. In ΔABC, AB = AC and ∠B = 50°, then find ∠C.

5. In triangles ABC and PQR, AB = AC, ∠C = ∠P and ∠B = ∠Q. The two triangles are

6. It is given that ΔABC = ΔFDE and AB = 5 cm, ∠B = 40° and ∠A = 80°. Then which of the following is true?

7. For two triangles, if two angles and the included side of one triangle are equal to two angles and the included side of another triangle. Then the congruency rule is:

8. In ∆ PQR, ∠R = ∠P and QR = 4 cm and PR = 5 cm. Then the length of PQ is

9. In figure if AE || DC and AB = AC, find the value of ∠ABD.

10. D is a point on the side BC of a ΔABC such that AD bisects ∠BAC. Then

11. In a right triangle, the longest side is:

12. Two sides of a triangle are of lengths 5 cm and 1.5 cm. The length of the third side of the triangle cannot be

13. In triangle ABC, if AB=BC and ∠B = 70°, ∠A will be:

14. In figure AB ⊥ BE and EF ⊥ BE. If BC = DE and AB = EF, then ΔABD is congruent to

15. In figure AB ⊥ AE, BC ⊥ AB, CE = DE and ∠AED = 120°, then find ∠ECD.

16. If ABC and DBC are two isosceles triangles on the same base BC. Then:

17. ABC is an isosceles triangle in which altitudes BE and CF are drawn to equal sides AC and AB, respectively. Then:

18. In given figure, the measure of ∠BAC is

19. In ΔABC, ∠C = ∠A and BC = 4 cm and AC = 5 cm, then find length of AB.

20. In triangles ABC and DEF, AB = FD and ∠A = ∠D. The two triangles will be congruent by SAS axiom if