Polyhedron
A three-
dimensional shape
whose faces are
polygons is known
as a polyhedron.

3D shapes
• CUBE
• CUBOID
• SPHERE
• CONE
• CYLINDER
• PRYSM
• PYRAMID

Definition
• Vertex- Each corner (or point) of a solid
where faces meet is called vertex.
• Faces – Each flat surface of a solid is called
face.
• Edges - The line segment that is the
intersection of two faces is called edge.

CUBE
• 6 Faces
• 12 Edges
• 8 Vertices
CUBOID
• 6 faces
• 12 edges
• 8 vertices

PYRAMID
• 4 faces
• 6 edges
• 8 vertices
CYLINDER
• 2 circular faces
• 2 curved edges
• No vertex

CONE
• 1 curved face and 1
flat face
• 1 curved edge
• 1 vertex
SPHERE
• A curved surface
• No vertex
• No edge

NETS OF SOLID SHAPES
NETS OF FOLLOWING SHAPES ARE:-
• CUBE
• CUBOID
• PYRAMID
• CYLINDER
• CONE
• TRINGULAR PRISM

Match the following
Solid shapes
a)CUBE
b)CYLINDER
c) CONE
d)TRINGULAR
PRISM
Nets
1
2
3
4