NCERT Class 7 Mathematics Solutions: Chapter 6 – the Triangle and Its Properties Exercise 6.3 Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Triangle Made with 50 Degree and 70 Degree Angle

1. Find the value of unknown x in the following diagrams:

Triangle ABC Are Given
Triangle PQR
Triangle XYZ
Isosceles Triangle Are Given
Given Triangle is Equilateral Triangle
Given Right Angled Triangle

Answer:

(i) In

[By angle sum property of a triangle]

(ii) In

[By angle sum property of a triangle]

(iii) In

[By angle sum property of a triangle]

(iv) In the given isosceles triangle

[By angle sum property of a triangle]

(v) In the given equilateral triangle

[By angle sum property of a triangle]

(vi) In the given right angled triangle

[By angle sum property of a triangle]