# Prisms

**Prisms** are polyhedra that have two parallel, equally sized faces called **bases** and their **lateral faces** are parallelograms.

The **height** of a prism is the distance between the bases.

The **lateral edges** of a prism are equally sized parallel edges.

#### Unfold of a Prism

## Types of Prisms

### Regular Prisms

The bases of the regular prisms are regular polygons.

### Irregular Prisms

The bases of the irregular prisms are irregular polygons.

### Right Prisms

### Oblique Prisms

The lateral faces of the oblique prisms are rhomboids or rhombi.

### Parallelepipeds

### Cuboid

The faces of **cuboids** are rectangular faces.

## Types of Prisms by Their Base

### Triangular Prism

### Square Prism

The bases are squares.

### Pentagonal Prism

### Hexagonal Prism

### Lateral Area of a Prism

### Surface Area of a Prism

### Volume of a Prism

#### Examples

Calculate the height of a prism whose base has an area of 12 dm² and whose capacity is 48 liters.

Calculate the lateral area, surface area and volume of a prism whose base is a rhombus with diagonals of 12 and 18 cm.

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