Question

2.In figure, the value of x is: *

3 points



a.120 degree

b.130 degree

c.110 degree

d.100 degree


​

Answer 1

Answer:

b) 130 is answer

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Answer 2

Given : Exterior angles of  a triangle

To Find : Value of x

Solution:

Sum of all the exterior angles of a polygon is 360°.

Hence

x + 110° + 120°   = 360°

=> x + 230° = 360°

=> x = 130°

Another Method :

Linear pair is 180°

Interior angle of 120°   is 180° - 120° = 60°

Interior angle of 110°   is 180° - 110° = 70°

Exterior angle of Triangle = Sum of opposite two interior angles

=> x = 60° + 70°

=> x = 130°

Hence Value of x is 130°

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