立体切断シミュレーター｜断面を観察

What shape is the cross-section when you cut a 3D object? This math learning tool lets you explore this question by manipulating 3D shapes and their cross-sections.

You can choose from cubes, rectangular prisms, triangular prisms, cylinders, cones, and square pyramids, and observe the cross-sections by changing their height and inclination. You can rotate and enlarge the 3D object, and display the two separated parts after cutting. It also supports operations such as selecting three points to define a plane and viewing the cross-section from the front.

With examples ranging from triangles to hexagons and five challenges, you can learn about spatial geometry through hands-on activities.