Triangles Class 9 MCQs Questions with Answers

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

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

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

4. 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:

5. 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.

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

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

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

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

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

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

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

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

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

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

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

17. 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

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

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

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