Area of a parallelogram worksheets

A parallelogram uses exactly the arithmetic its rectangle would: base times height. The catch is that the height is the perpendicular distance, not the sloping side. These free printable worksheets drill that one figure.

Area of a parallelogram
Area of a parallelogram worksheet — Bases to 30 cm, free printable with answer key

The answer key prints on a separate page.

What's on this sheet

This is the parallelogram pulled out of the mixed area page on its own. Facing the same shape every time is what lets a child see why the formula works — slide the slanted triangle from one end to the other and the parallelogram becomes a rectangle of the same base and height, so base times height is all it ever needed.

Why this sheet works

The height is dashed with a right-angle mark and the slant side is left unlabeled, exactly so a child cannot use it by mistake. Measuring the slant edge is the single error this figure is built to prevent, because that number is always a little too big.