How do I calculate the area of a square with 490 mm2?

[ladil123]

Hello!

This is pretty easy but i´m failing...

The area of this "square" should be 490 mm2 .
What the proper way to do this..., I guess its simple geometry but for the moment I am drawing blank...

 

[CompuChip]

Something is wrong in your image, when I consider the number all the way at the bottom to be the length of a side... using Pythagoras to calculate the diagonal length doesn't give me the indicated value.
Is it really a square? What precisely measures 22.3?

 

[ladil123]

No, its nor really a square. Yes, it was a pretty crappy picture, but I got to the solution on my own. thanks for the help

 

[WadeS]

I need help with normal shape area. Anyone?

 

[Redbelly98]

WadeS, welcome to PF

It would have been best to ask your question in a brand new thread, since it appears unrelated to what was asked here.

That being said, what shape is it you need help with finding the area?