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AutoCAD is used to create 2D and 3D drawings and drawings with parametric features. It is a suite that integrates several applications, which run in separate windows.

The user interface of AutoCAD, which is different from most other CAD programs, is divided into two areas. On the left side is the drawing area, which is divided into two sections: the drawing area and the layout area. The layout area is used to create and edit geometric modeling elements, such as layers and curves. All objects that appear on the drawing are initially placed in the layout area. In the drawing area, the user works with individual lines and objects, such as circles and rectangles.

AutoCAD contains several specialized drawing tools and features that enable the user to create and modify drawings. They are described in the following section.

Drawing tools and functions


Objects are the elements of a drawing. They can be represented by lines, arcs, 2D and 3D solids, surfaces, and components. All objects can be filled with colors, patterns, gradients, textures, and materials.

In the image on the left, the objects are represented by line segments, circles, rectangles, and arcs. The object on the right is a 3D solid.

Lines, arcs, and curves

All objects are constructed using lines, arcs, and curves.

A line is a geometric entity that consists of two or more points connected by a straight line. A line segment is a line between two points. A closed line segment is one that connects the two end points and is typically used to draw a loop. A line segment can also be open. When an open line segment is placed in a drawing, the two or more points are joined by a line.

An arc is a line between two points. Unlike a line, the arc allows the user to modify its shape. The end points of an arc are connected by a curve. An arc can be open or closed, and it can be one of several shapes, such as a circle, ellipse, or a hyperbola.

A 2D solid is a closed geometric entity that is constructed by connecting a series of 2D lines or arcs. The user can construct a 2D solid by connecting the line segments that make up a closed line or arc. 2D solids can also be closed, that is, constructed by connecting the end points of

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The AutoCAD API are the interface methods used to interact with the program. AutoCAD has a loosely defined and compatible API with the Document Object Model (DOM) methods. These are documented in the Autodesk Architectural Library. The following AutoCAD APIs are available:

These are defined in the Autodesk Architectural Library.

Accessibility and similar features
AutoCAD’s accessibility features make it usable for those with disabilities. It allows changing the screen reader’s default language, setting the program to use aural navigation (optionally), and setting character set preferences. When enabled, the font size is automatically changed when windowed or maximized. If a screen reader is activated, AutoCAD communicates with it through the use of an XML language.

Support and training
AutoCAD is supported by the same staff who support AutoCAD LT, and users have access to technical support when buying the product. The number of customer-support calls related to the program is relatively low. When users have questions about installation, training, and product features, they have the ability to connect to a technical support representative.

A comprehensive training system allows users to access video tutorials, webcasts, tutorials, and other resources.

There are training options available in the Learning Center, including tutorials, guides, and videos.

In March 2011, the German newspaper Bild am Sonntag reported that due to the end of the licence model for AutoCAD, “the Digital version of AutoCAD 2010 is planned to be free in September 2012. This was made possible by a successful court case that the German legislator filed against Autodesk. If Autodesk had continued to make licensing fees, the popular product could have been prohibited from being used for free.


External links

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Generalizing for a discrete probability model

Let’s say I have a discrete probability model defined as such:

$P(\mathcal{A}) = \sum_{a=0}^{a=b} P(a)P(a \mid \mathcal{A})$

The problem

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How to install Autodesk 3ds Max and activate it
Go to or search 3dsmax in your computer.
Follow the instructions.
Enter “1000” as the license key.

How to install Autodesk 3ds Max 2018 and activate it
Go to
Search Autodesk 3ds Max 2018 and get the installer.
Run the setup and follow the instructions.
Enter “1000” as the license key.


usage: autocad
help: autocad -h
autocad -help

Show autocad version information and exit.
Display help message and exit.
Display help message and exit.
Display version information and exit.
Display help message and exit.
Display help message and exit.
Display help message and exit.
Display help message and exit.
Display version information and exit.
Display help message and exit.

What’s New In?

Incorporate a model into your CAD drawings, and take advantage of the scale-independent properties of the model to help you think more visually. (video: 1:36 min.)

Bring reference data to your design through a simple reference function, then use AutoCAD to create clean, precise vector lines that take advantage of the benefits of 2D and 3D objects. (video: 2:08 min.)

Include other CAD drawings with relative precision through editable anchor points. (video: 1:36 min.)

Enhance your drawing speed with new commands, guides, and dialogs that increase design speed, productivity, and power. (video: 2:54 min.)

Bring in your data from nearly any device with a new import feature that replaces the document scanner command. (video: 2:43 min.)

Add features to the existing CAD surface, 2D modeling tools, and standard drawing commands, and make features, 3D models, and drawing tools more useful. (video: 2:43 min.)

Get more precise control over your documents with commands and features for manipulating windows, objects, and layers. (video: 2:08 min.)

Create customizable tools with dialog boxes, command line options, and the new command line (CLI) interface. (video: 2:08 min.)

Dynamically turn parts of your drawing into cross-references with “dynamic reference groups.” (video: 1:18 min.)

Take advantage of the benefits of shape flexibility in 3D with better support for complex shapes. (video: 2:08 min.)

Keep your designs consistent when creating, using, and editing drawings with a new commands and editor that allow you to more easily coordinate changes and integrate them into the drawing. (video: 1:36 min.)

Coordinate changes and integrate them into the drawing. (video: 2:08 min.)

Edit and make changes in a drawing with a new drawing mode, mode support for intelligent objects, and updates to the text editor and ribbon. (video: 2:08 min.)

Export 2D graphics and other objects into another CAD system with the new import option. (video: 1:18 min.)

Eliminate the need for multiple versions of your design using a built-in workspace conversion tool. (video: 1:15 min

System Requirements:

OS: Windows 10 or later
Processor: Intel Core i3, i5, i7, or AMD equivalent
Memory: 2 GB RAM required
Graphics: AMD R9 series or Nvidia GTX series or Intel HD Graphics 4000
DirectX: Version 11
Network: Broadband Internet connection
Hard Drive: 5 GB available space
Recording System Requirements:
Memory: 2 GB RAM