面積パズル工房｜図形を動かして面積公式を学ぶ

This learning app for elementary school 4th graders to junior high school 2nd graders allows them to experience how area formulas work by cutting and manipulating shapes.

Select a triangle, trapezoid, or parallelogram, and move the parts to transform it into a rectangle. See how the area changes by altering the base and height, and connect it to the formula with hints and diagrams.

This app is useful for students who want to discover for themselves how the area remains the same even when the shape is changed, before simply memorizing the formula.