NCERT Class 7 Mathematics Solutions: Chapter 6 –The Triangle and its Properties Exercise 6.3 Part 2

Get top class preparation for IMO-Level-2 Class-7 right from your home: fully solved questions with step-by-step explanation- practice your way to success.

Exterior Angle of a triangle and its property

Exterior Angle of a Triangle and Its Property

Loading Image

1. Find the values of the unknowns in the following diagrams:

Give Triangle and Angle X, Y, 50 Degree and 120 Degree

Give Triangle and Exterior Angle

Give Triangle and Angle 50 Degree and 60 Degree

Give Triangle and Angle 30 Degree and X and Y

Triangle and Exterior Angle Are Given

Triangle and Exterior Angle Shown in Figure

Answer:

(i) Consider,

[Exterior angle property of triangle]

Now,

[Angle sum property of triangle]

(ii) ………………..eq (1)

Now,

[Angle sum property of triangle]

[From eq (1)]

(iii) [Exterior angle property of a triangle]

Now,

[Angle sum property of a triangle]

(iv) ………………….eq (1) [Vertically opposite angle]

Now,

[Angle sum property of a triangle]

[From equation (i)]

(v) ………………….eq (1) [Vertically opposite angle]

Now,

[Angle sum property of a triangle]

[From equation (i)]

(vi) ………………….eq (1) [Vertically opposite angle]

Now,

[Angle sum property of a triangle]

[From equation (i)]