Question

For what value of x+y in given figure ABC be
a line ? justify y-axis answer.
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Answer 1

Answer:

The value of x+y = 180 The line ABC will be a straight line if the angle ABC will be 180 degree. Hence, the value of x+y have to be 180 degree. If we take ABC as the x axis and x=y=90 degree, then BD will be y-axis.