Examples for

# Polygons

A polygon is a plane geometric figure consisting of at least three vertices (or corners) and edges connecting them into a closing loop. It can also refer to the closed region bounded by the edges, so a polygon can have geometric properties associated with area. Wolfram|Alpha has the ability to recognize several flexible input forms for multiple types of polygons and to compute their properties, including diameter, perimeter, interior angle, etc.

### Triangles

Compute one specific property or multiple properties given a triangle.

#### Compute properties of a triangle:

#### Specify side-angle-side:

#### Compute the area of a triangle:

#### Find the nine-point circle for a given triangle:

### Regular Polygons

Compute one specific property or multiple properties given a regular n-gon.

#### Compute properties of a regular polygon:

#### Specify parameters for a polygon:

#### Compute the diameter of a polygon:

#### Find the incircle of a regular polygon:

#### Count the intersections of diagonals:

### Quadrilaterals

Compute properties of parallelograms, rectangles and other quadrilaterals.