**PRISM**

A

prism is a solid, whose side faces are parallelograms and whose ends (or bases)

are congruent parallel rectilinear figures.

prism is a solid, whose side faces are parallelograms and whose ends (or bases)

are congruent parallel rectilinear figures.

**Lateral Surface area:**The

surface area is the area that describes the material that will be used to cover

a geometric solid. When we determine the surface areas of a geometric solid we

take the sum of the area for each geometric form within the solid.

**Volume:**The volume tells

us something about the capacity of a figure

**Total surface area:**Area

of lateral surface + base area

**Volume of prism**= Area of base × Height.

**Lateral Surface area**= Perimeter of base × Height.

**Total surface area**= Lateral surface area + 2(Area of base)

**Pyramid**

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A pyramid is a polyhedron whose base is a polygon of any

number of sides and whose other faces are triangle with a common vertex.

**Volume of pyramid**= 1/3 (Area of base) × height

**Lateral Surface area**= 1/2 (Perimeter of base) × Slant

height.

**Total surface area**= Area of base + lateral surface area.

**Vertex**: The common vertex of the triangular faces of a pyramid is called the vertex of the pyramid.

**Slant height:**The slant height of regular right-pyramid is

the line segment joining the vertex to the mid-point of anyone of the sides of

the base.

**Lateral faces:**The side of a pyramid are known as its lateral faces. If the

base of a pyramid is a polygon of n sides then it has n lateral faces, each one

of which is a triangle and 2n edges