Explore the relationships of line segments when the area of a parallelogram is halved.

Explore the similarity of the area formulas for quadrilaterals and triangles.

Explore seating arrangements using square tables.

Explore the sum of interior angles of a quadrilateral.

Explore area and perimeter of quadrilaterals whose sides have integral length.

Make more squares from less.

Explore with pentominoes.

Remove toothpicks from the figure to leave five squares.

Determine the number of “outside” squares in a given figure.

Explore various relationships in a given construction involving a parallelogram.