Answer:
Given, perimeter of a regular pentagon = 100 cm We know that, a regular pentagon has 5 equal sides. \[\therefore \] Perimeter of a regular pentagon \[=5\times \] Length of a side So, we can divide given perimeter by 5 to get the one side of a regular pentagon. \[\therefore \] Length of one side \[=\frac{\text{Perimeter of a regular pentagon}}{5}\] Hence, all the sides of a regular pentagon is of 20 cm.
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