Triangles Class 9 MCQs Questions with Answers

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

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

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

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

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

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

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

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

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

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

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

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

13. 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

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

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

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

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

18. 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.

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

20. 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: