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Dissecting a parallelogram to a rectangle

Topic:
Area
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.