Question

I NEED THE ANSWER AS SOON AS POSSIBLE PLEASE!!​

Answer 1

`\Large \boxed{\sf \ \ 4√(a^2+b^2) \ \ }`

Explanation:

Hello,

You can use Pythagoras in the 4 right triangles.

For one triangle it comes
`√(a^2+b^2)`.

Then for the polygon it gives
`4\cdot √(a^2+b^2)`.

Hope this helps.

Do not hesitate if you need further explanation.

Thank you