Dissecting a parallelogram to a rectangle
Drag the point marked "Move cut-off piece" to rearrange the pieces to a rectangle.
You can change:
The location of the cut on the parallelogram
The height of the parallelogram
The base of the parallelogram (A or B)
The shape of the parallelogram (A, B, and/or D)
The slider for moving the cut-off piece can be moved to directly measure the base of the parallelogram and rectangle.
The outlined rectangle can be moved to compare directly to other objects.