Class 9 Mathematics Quiz Chapter 7

Chapter 7 – Triangles

Play the below Class 9 Mathematics Quiz Chapter 7 – Triangles. These questions are very important for examination. We have provided a quiz from each chapter of class 9 Mathematics NCERT book. Check it on our website.


1. If the angles of a triangle are in the ratio 3:2:1 then the measure of the largest angle is

(A) 60°
(B) 30°
(C) 90°
(D) 180°

2. If the bisectors of the acute angle of a right angle triangle meet at O, then the angle at O between the two bisectors is

(A) 90°
(B) 45°
(C) 60°
(D) 135°

3. If \large\bf \triangle ABC \cong \triangle ACB, then \large\bf \triangle ABC is isosceles with

(A) \lareg\bf AB = BC
(B) \lareg\bf AB = AC
(C) \lareg\bf AC = BC
(D) None of these

4. In the given figure, the measure of \large\bf \angle QPR is,

(A) 50°
(B) 40°
(C) 100°
(D) 80°

5. ABC is an isosceles triangle such that AB = AC and AD is the median to the base BC. Then \large\bf \angle BAD =

(A) 55°
(B) 70°
(C) 35°
(D) 110°

6. If \large\bf \triangle ABC \cong \triangle PQR, then \large\bf \angle ACB =

(A) \large\bf \angle PQR
(B) \large\bf \angle PRQ
(C) \large\bf \angle QPR
(D) \large\bf \angle RQP

7. D, E, F are the mid points of the sides BC, CA and AB respectively of \large\bf \triangle ABC. Then \large\bf \triangle DEF is congruent to

(A) \large\bf \triangle ABC
(B) \large\bf \triangle BFD \hspace{3pt}, \triangle AFE
(C) \large\bf \triangle CDE,\hspace{3pt} \triangle BFD
(D) \large\bf \triangle AFE, \hspace{3pt} \triangle BFD, \hspace{3pt}, \triangle CDE

8. ABCD is a parallelogram. If the two diagonals are equal, find the measure of \large\bf \angle ABC

(A) 120°
(B) 60°
(C) 90°
(D) 100°

9. If \large\bf \triangle ABC \cong \triangle FDE and AB = 5cm, \large\bf \angle B=40^{\circ} and \large\bf \angle A=80^{\circ}, Then which of the following is true

(A) \large\bf DF=5cm, \hspace{3pt} \angle F = 60^{\circ}
(B) \large\bf DF=5cm, \hspace{3pt} \angle E = 60^{\circ}
(C) \large\bf DE=5cm, \hspace{3pt} \angle E = 60^{\circ}
(D) \large\bf DE=5cm, \hspace{3pt} \angle D = 40^{\circ}

10. In a \large\bf \triangle ABC, if AB = AC and BC is produced to O such that \large\bf \angle ACO = 100^{\circ}, then \large\bf \angle A =

(A) 20°
(B) 40°
(C) 60°
(D) 80°



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