Technical details
Description, documents, and source code.
Make the Pythagorean theorem visible
Explore a² + b² = c² with a rotating model containing three transparent square chambers arranged around a right triangle. The chambers share the same depth, so their capacity is proportional to their square area.
How the experiment works
Fill the two smaller squares, close the plug, and rotate the disk in its stand. Watch the contents move into the larger square on the hypotenuse. Use the included experiment sand, or add clean water slowly with the dropper to reduce bubbles.
This is a visual demonstration of the area relationship, not a formal mathematical proof. Suitable for middle- and high-school geometry, classroom demonstrations, math clubs and family STEM activities.
In the kit
- Transparent three-square chamber, rotating base disk and support stand
- Large and small O-rings and plug
- 9 capped screws and screwdriver
- Dropper and a bag of experiment sand
Specifications and care
Approximate size: 13.3 × 13.5 cm. Plastic construction with metal screws. Assembly required. Assemble with adult guidance and tighten screws evenly so the O-rings seal. Drain and dry after water experiments. Contains small parts; keep away from young children.
中文说明：勾股定理演示模型
三个透明方形腔体分布在直角三角形三边上，腔体深度相同，容量与面积成比例。向两个较小方格装入实验沙或清水，塞好后转动圆盘，观察内容物流入斜边上的大方格，直观演示a²+b²=c²的面积关系。
配有透明腔体、旋转圆盘、支架、大/小O形密封圈、塞子、9颗带帽螺丝、螺丝刀、滴管及实验沙。成品约13.3×13.5厘米，塑料及金属螺丝结构，需组装，适合初中以上几何学习及课堂演示。
本模型是直观演示，不代替严格数学证明。成人指导组装并均匀拧紧螺丝，注水时减少气泡，使用后排水擦干。小零件远离幼儿。