Hi students, Welcome to **AMBiPi (Amans Maths Blogs)**. In this article, you will get * Important MCQ Questions for Class 10 Maths Chapter 6 Triangles*. You can download this PDF and save it in your mobile device or laptop etc.

**Important MCQ Questions of Triangles Class 10 Question No 21:**

If ∆ABC ~ ∆QRP and ar(∆ABC)/ar(∆PQR) = 9/4, AB = 18 cm and BC = 15 cm, then PR is equal to

**Option A** : 10 cm

**Option B** : 12 cm

**Option C** : 20/3 cm

**Option D** : 8 cm

**Show/Hide Answer Key**

**Option A : 10 cm**

**Important MCQ Questions of Triangles Class 10 Question No 22:**

If S is a point on PQ of a ∆PQR such that PS = QS = RS, then

**Option A** : PR.QR = RS^{2}

**Option B** : QS^{2} + RS^{2} = QR^{2}

**Option C** : PR^{2} + QR^{2} = PQ^{2}

**Option D** : PS^{2} + RS^{2} = PR^{2}

**Show/Hide Answer Key**

**Option C : PR ^{2} + QR^{2} = PQ^{2}**

**Important MCQ Questions of Triangles Class 10 Question No 23:**

Find the value of x in the figure below if DE || AB.

**Option A** : x = 2

**Option B** : x = 1

**Option C** : x = 6

**Option D** : x = 4

**Show/Hide Answer Key**

**Option A : x = 2**

**Important MCQ Questions of Triangles Class 10 Question No 24:**

Diagonals of a trapezium PQRS intersect each other at the point O. PQ || RS and PQ = 3RS. Find the ratio of the areas of the triangles ∆POQ and ∆ROS.

**Option A** : 5 : 4

**Option B** : 6 : 9

**Option C** : 9 : 1

**Option D** : 1 : 2

**Show/Hide Answer Key**

**Option C : 9 : 1**

**Important MCQ Questions of Triangles Class 10 Question No 25:**

Find the altitude of an equilateral triangle of side 8 cm.

**Option A** : 2√3 cm

**Option B** : 3√3 cm

**Option C** : 4√3 cm

**Option D** : 5√3 cm

**Show/Hide Answer Key**

**Option A : 13**

**Important MCQ Questions of Triangles Class 10 Question No 26:**

If ∆ABC ~ ∆DEF, AB = 4 cm, DE = 6 cm, EF = 9 cm, FD = 12 cm. Find the perimeter of the triangle ABC.

**Option A** : 16 cm

**Option B** : 13 cm

**Option C** : 15 cm

**Option D** : 18 cm

**Show/Hide Answer Key**

**Option D : 18 cm**

**Important MCQ Questions of Triangles Class 10 Question No 27:**

In the figure below, if DE || BC, then the ratio of areas of the triangle ADE and the area of the quadrilateral (DECB).

**Option A** : 1 : 2

**Option B** : 1 : 4

**Option C** : 1 : 3

**Option D** : 2 : 3

**Show/Hide Answer Key**

**Option C : 1 : 3**

**Important MCQ Questions of Triangles Class 10 Question No 28:**

Corresponding sides of two similar triangles are in the ratio of 2 : 3. If the area of smaller triangle is 48 cm^{2}. Then, find the area of the larger triangle.

**Option A** : 97 cm^{2}

**Option B** : 108 cm^{2}

**Option C** : 107 cm^{2}

**Option D** : 204 cm^{2}

**Show/Hide Answer Key**

**Option B : 108 cm ^{2}**

**Important MCQ Questions of Triangles Class 10 Question No 29:**

Areas of two similar triangles are in 36cm2 and 100 cm2. If the length of a side of the larger triangle is 20 cm. Then, what is the length of the corresponding side of the smaller triangle.

**Option A** : 10 cm

**Option B** : 15 cm

**Option C** : 12 cm

**Option D** : None of these

**Show/Hide Answer Key**

**Option C : 12 cm**

**Important MCQ Questions of Triangles Class 10 Question No 30:**

In figure below, if the triangles ACB is similar to the triangle CDA and if AC = 8 cm and AD = 3 cm, then find the value of BD.

**Option A** : 54/3 cm

**Option B** : 52/3 cm

**Option C** : 45/7 cm

**Option D** : 55/3 cm

**Show/Hide Answer Key**

**Option D : 55/3 cm**