Question

Among the following shapes with equal perimeter, which one of has the largest area.

A square

An equilateral triangle

A circle

A regular pentagon

Justify your answer​

Answer 1

circle among all shapes has got the largest area at the same perimeter

it's area becomes perimeter^2/4pi

thus it's area for a particular perimeter is the largest

Answer 2

Answer:

area if the circle is 2/4π times of perimeter

and thus having the largest area among all