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 Description  
 Adjacent Sides:  Two sides of a polygon that share a common vertex.
Examples of Adjacent Sides



In triangle on the left, sides d and f are considered adjacent sides of triangle ABC since they share the common vertex B. Can you identify other sides that are adjacent?



In the square on the right, sides f and g are considered adjacent sides of the square ABCD since they share the common vertex C.

Non-Examples of Adjacent Sides
In the square above, sides f and h are not adjacent sides since they do not share a common vertex. Likewise, sides e and g are not adjacent sides of the square.