Question

I really need help please...

Answer 1

so than this is a regular poligon so this mean that is a square with every 4 sides equale
you know that the diagonales of a square halfed and are perpendiculares so make a central angle of 361 degree divided in 4 equale parts



for triangle AOB using pythagora s theorem you can calculi easy the length of hypothenuse so what will be eaxactly the length of a side of this square
- than you know the length of a side so you can calcule easy area of this square

hope this will help you