Q10 of 30 Page 212

The perimeter of a regular pentagon is 100 cm. How long is its each side?

It is given that,

Perimeter of a regular pentagon = 100 cm


We know that,


Perimeter of a regular pentagon = 5 × Length of side


100 = 5 × Side


Side = = 20 cm


Thus, the side of the pentagon is 20 cm.


More from this chapter

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8

Find the perimeter of a regular hexagon with each side measuring 8 m.

 9

Find the side of the square whose perimeter is 20 m.

 11

A piece of string is 30 cm long. What will be the length of each side, if the string is used to form:

(a) A square?


(b) An equilateral triangle?


(c) A regular hexagon?

 12

Two sides of a triangle are 12 cm and 14 cm. The perimeter of the triangle is 36 cm. What is its third side?