Hi guys, so I tried solving several ways but I get different results. I’m just trying to understand where my mistake is.

So we’ll take x als the width and y as the length.

Total area rectangle= xy

Area of one shaded triangle

1/2 x . 1/2 y . 1/2 = 1/4x . 1/4y = 1/16xy

There are four triangles so 1/16xy . 4 = 4/16xy = 1/4xy

Area unshaded is xy - 1/4xy = 3/4

I know this is wrong but which mistake am I making?

Also I learned somewhere that when there are midpoints within a rectangle, that will produce a rhombus. How will that help solve this question? Thanks