: They consist of faces (flat surfaces), edges (where two faces meet), and vertices (points where edges meet). Examples :

: Cube, rectangular prism (parallelepiped), and pyramid. Bodies of Revolution : Sphere, cylinder, and cone.

Understanding the transition from flat (plane) shapes to volumetric (solid) bodies is a foundational step in 4th-grade geometry. It bridges the gap between simple drawing and understanding the physical world in three dimensions.

: For flat shapes, we calculate perimeter (the boundary) and area (the surface size). Examples :

Flat figures are objects. A figure is considered flat if all its points lie on a single plane. Key Measurements : They have only length and width .

Obieemnye Figury 4 Klass Prezentatsiia — Ploskie I

: They consist of faces (flat surfaces), edges (where two faces meet), and vertices (points where edges meet). Examples :

: Cube, rectangular prism (parallelepiped), and pyramid. Bodies of Revolution : Sphere, cylinder, and cone.

: For flat shapes, we calculate perimeter (the boundary) and area (the surface size). Examples :

Flat figures are objects. A figure is considered flat if all its points lie on a single plane. Key Measurements : They have only length and width .