Area Problem

[silver shale]

I do know how to solve area it’s just that idk how to make a equation for this one😭😭 Genuinely just need a slight hint 🙏🙏

[silver shale]

Here’s what I got:

Am I supposed to solve for the areas of the triangles and then minus it

idk

[brisk fern]

do area of rectangle = area of triangle and use the angles as a hint on how to find dimentions

[silver shale]

ok, ill try that. thanks!