Question

A regular pentagon and a square share a mutual vertex B. The sides AB and BC are sides of a third regular polygon with vertex B. How many sides does this polygon have?

Answer 1

There are different kinds of polygon. The number of sides that this polygon have is 5.

What is the polygon about?

Note that the side of each polygon = 3.5

The parameter of  polygon  =17.5

Therefore the number of sides =  parameter of  polygon /  parameter of  polygon  

So =      $\frac{17.5}{3.5}$

=5

Therefore, The number of sides that this polygon have is 5.

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