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Question

In a general triangle ADE (as shown) lines EB and EC are drawn. Which of the following relations is true?
923279_f79aaf2fb3c548159e2470b6139f347a.png

A
x+z=a+b
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B
y+z=a+b
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C
m+x=w+n
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D
x+y+n=a+b+m
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Solution

The correct option is D x+y+n=a+b+m
Exterior angles = Sum of internally opposite angles in a triangle
z=w+n, n=b+a, m=y+x, c=w+m
x+y+n=x+y+b+a=m+b+a ( m=y+x)
x+y+n=a+b+m

1088399_923279_ans_6e043f4a66f5433abc13fab6cb8167b8.png

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