Hello, jwein4492!

In the following diagram, NDBA is a rectangle,

What is the area of parallelogram ?

Code:A G 11 D * - - - - - * - - - - - - * | * * | | * _ * | | * 8√2 * | x | * * | | * * | * - - - - - - * - - - - - * A F x B

We know the base of the parallelogram: .

We need the height,

Since is a 45° right triangle.

Using Pythagorus: .

Therefore: .

Got it?