Drag unit squares and pieces of unit squares to find the area of each of 5 figures, or create your own figure using the pieces (uncheck the Figure box in the upper left corner). Rotate or reflect pieces using the transformation box on the right side of the screen. Stamp a shape and reuse the same pieces.
Similar apps with different features are also available from EDC in Maine (https://www.geogebra.org/u/edc+in+maine), including "Area Blocks (5 Figures with Rectangle)" (https://www.geogebra.org/m/fw7PfwQT), which is nearly the same as this app but includes a resizable rectangle to help find the area of a figure, and "Area Blocks (Triangle)" (https://www.geogebra.org/m/X2yvdBbm), which has only 1 figure (a triangle) to fill.
Contact us at maine@edc.org if this resource should be updated, or with questions or suggestions. We appreciate your help maintaining the quality of this resource.
