Solid shapes
Japanese school year: Elementary 1
What you learn
Learn to identify common three-dimensional shapes like boxes, cylinders, and spheres by observing their surfaces and rolling abilities. These observational skills help with organizing objects and building structures in daily play. Experiencing hands-on exploration and comparing real-world items will provide an excellent and intuitive starting point for this learning.
Key points
Solids made of flat faces, such as a cuboid or a cube, can be stacked or slid. A solid with only a curved surface, such as a sphere, rolls. A cylinder has both flat and curved surfaces.
The flat parts of a solid are called faces, the lines where two faces meet are edges, and the points where edges meet are vertices. A cuboid has 6 faces, 12 edges and 8 vertices.
A cube has six identical square faces. In a cuboid, opposite faces are identical rectangles. A cylinder has a circle on the top and bottom, and a sphere looks like a circle from every direction.
Choose a set to practice.