Question

find the perimeter .of a regular Pentagon of each side 3cm.

Answer 1

perimeter = sum of all sides of the Pentagon
We know that Pentagon has 5 sides
Given side length=3cm
so perimeter=5×3=15
=3+3+3+3+3=15
so perimeter=15cm

Answer 2

The perimeter of a regular Pentagon of each side 3 cm.

 

we know that a Pentagon has 5 sides( all sides are not equal)

,but a regular Pentagon has 5 equal sides.

 

sum of all sides of Pentagon = its perimeter

=3+3+3+3+3= 15

 

or

 

perimeter = 5 X side

= 5 X 3

= 15

so the perimeter of regular Pentagon of each side 3 cm is 15cm.