Mathematics

A ray stands on a line, then the sum of the two adjacent angles so formed is ______.


ANSWER

$$180^o$$


SOLUTION

Answer is option A

If a ray stands on a line, then the sum of two adjacent angles so formed is 180.Conversely if the sum of two adjacent angles is 180, then a ray stands on a line (i.e., the non-common arms form a line).

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