立方体の切断 v2

Topic:Congruence, Constructions, Cube, Equilateral Triangles, General Quadrilateral, Geometry, Isosceles Triangles, Line Segment, Mathematics, Parallelogram, Plane Figures or Shapes, Planes, Polygons, Quadrilaterals, Rectangle, Rhombus, Right Triangles, Solids or 3D Shapes, Square, Trapezoid, Triangles