Triangles Class 9 MCQs Questions with Answers

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

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

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

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

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

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

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

8. 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:

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

10. 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.

11. 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

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

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

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

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

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

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

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

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

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