Question

A regular decagon Fig. $\left(a\right)$ has $10$ equal sides Each side measures $8cm.$Find the perimeter of the regular decagon$.$Also find the perimeter of regular polygon which has $n$ equal sides with measures of $7cm$ of each side$.$

Answer 1

It is given that a regular decagon has each side measures $8cm.$

As we know that a regular decagon has $10$ equal sides$.$

Perimeter of decagon $=8+8+8+8+8+8+8+8+8+8$

$=8\times 10$

$=80cm$

Now find the perimeter of polygon having $n$ sides with measures of $7cm$

Perimeter of polygon $=7+7+....+ntimes$

$=7ncm$

Hence$,$ the perimeter of decagon and polygon are $80cm$ and $7ncm$ respectively.