SPI 3108.4.5

Solid FiguresSolids enclose a part of space (3 dimensional or 3D).Solids with flat surfaces that are polygons are called

POLYHEDRONS.There are two types of Polyhedrons called PRISMS

and PYRAMIDS.

The 2-dimesional surfaces are called FACES.

Two faces intersect in a segment called an EDGE.

Three or more edges intersect at a point called a VERTEX.

PRISMSA solid figure with two parallel faces called

BASES. The two bases are connected by polygons called LATERAL FACES.

Bases

Lateral Faces

TRIANGULAR PRISM

RECTANGULAR PRISM –CUBE-

PENTAGONAL PRISM

PYRAMIDSA solid figure with one base and the lateral faces

meet at a common point called the VERTEX.

Base

Lateral Faces

Vertex

TRIANGULAR PYRAMID

-TETRAHEDRON-

RECTANGULAR PYRAMID

PENTAGONAL PYRAMIDS

CIRCULAR PRISM

-CYLINDER-CIRCULAR PYRAMID -CONE-

PLATONIC SOLIDS are special polyhedrons in which all the sides are the same.

Cube – all faces are squares.

Tetrahedron – all faces are triangles.