## ML Aggarwal Class 7 Solutions for ICSE Maths Chapter 11 Triangles and its Properties Ex 11.2

Question 1.

Find the value of the unknown exterior angle x in each of the following diagrams:

Solution:

Question 2.

Find the value of the unknown interior angle x in each of the following diagrams:

Solution:

Question 3.

Find the value of x in each of the following diagrams:

Solution:

Question 4.

Find the value of unknown x in each of the following:

Solution:

Question 5.

Find the values of x and y in each of the following diagrams:

Solution:

Question 6.

Find the values of x and y in each of the following diagrams:

Solution:

Question 7.

In the adjoining figure, find the size of each lettered angle.

Solution:

Question 8.

One of the angles of a triangle measures 80° and the other two angles are equal. Find the measure of each of the equal angles.

Solution:

Question 9.

If one angle of a triangle is 60° and the other two angles are in the ratio 2 : 3, find these angles.

Solution:

Question 10.

If the angles of a triangle are in the ratio 1 : 2 : 3, find the angles. Classify the triangle in two different ways.

Solution:

Question 11.

Can a triangle have three angles whose measures are

(i) 65°, 74°, 39°?

(ii) \(\frac { 1 }{ 3 }\) right angle, 1 right angle, 60°?

Solution: