Question

Find perimeter of a Ragular pantagen with each side measuring 15cm

Answer 1

Step-by-step explanation:

P=75cm

a Side

15

cm

d

a

d

a

d

a

P

a

A

Solution

P=5a=5·15=75cm

Answer 2

To find : perimeter of regular pentagon .

Given : side of regular pentagon $= 15\mathrm{~cm}$

Solution :

• We know that all four sides of regular pentagon are equal .
• If '$a$ ' is the side of regular pentagon then perimeter of regular pentagon is given by,

• Perimeter of regular pentagon $=5 a$

• Therefore, by substituting the value in above formula we find perimeter.

• Perimeter of regular pentagon $= 5a$

                                                              $\begin{array}{l}=5 \times 15\mathrm{~cm} \\=75\mathrm{~cm}\end{array}$

Hence, perimeter of regular pentagon is $75 \ cm$.