Which of the following is correct?
A) \[b=y\]
B) \[c=x\]
C) \[a=b\]
D) \[a+b+c=x+a+y\]
Correct Answer: D
Solution :
\[a+b+c=180{}^\circ \] (Sum of angles in a triangle) Also, \[x+a+y={{180}^{o}}\] (Angle on a straight line) \[\therefore \] \[a+b+c=x+a+y\]
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