Perimeter is the sum of all the sides of a closed figure

A regular decagon is a ten-sided polygon whose all ten sides are equal in length.

Perimeter of Regular Decagon is equal to ten times the length its side.

**Perimeter of Regular Decagon = 10 x Length of each side**

**Question 1**

Find the perimeter of a regular decagon of side 3.6cm?

**Explanation**

A regular decagon is a ten-sided polygon whose all ten sides are equal in length.

Length of a regular decagon = 3.6

Perimeter of regular decagon = (10 x Length of each side)units

= (10 x 3.6)cm

= 36cm

**Question 2**

Find the perimeter of a regular decagon of side 5.7cm?

**Explanation**

A regular decagon is a ten-sided polygon whose all ten sides are equal in length.

Length of a regular decagon =5.7

Perimeter of regular decagon = (10 x Length of each side)units

= (10 x 5.7)cm

= 57cm

**Question 3**

Find the perimeter of a regular decagon of side 4.2cm?

**Explanation**

A regular decagon is a ten-sided polygon that has all ten sides equal in length

Length of a regular decagon =4.2

Perimeter of a regular decagon =(10 x Length of each side)units

=(10 x 4.2)cm

=42cm

**Question 4**

Find the perimeter of a regular decagon of side 9.6cm?

**Explanation**

A regular decagon is a ten-sided polygon that has all ten sides equal in length

Length of a regular decagon =9.6

Perimeter of a regular decagon =(10 x Length of each side)units

=(10 x 9.6)cm

=96cm

**Question 5**

Find the perimeter of a regular decagon of side 12.8cm?

**Explanation**

A regular decagon is a ten-sided polygon that has all ten sides equal in length

Length of a regular decagon =12.8

Perimeter of a regular decagon =(10 x Length of each side)units

=(10 x 12.8)cm

=128 cm