How do you find the area of pentagon

Answer 1

I assume you mean a regular pentagon and how to do it by maths?

If t= length of one side.

The formula is
area = 5x t^2 x(tan54)/4

which is quite easy to remember!

If you evaluate the 5 x tan(54)/4 this is approximtately 1.72

so the area of a regular pentagon is approximately 1.72 x t^2