Circle.

In this tutorials for new beginners, you’ll learn how to use another 2D drawing tool Circle. 

Circle tool is a simple and easy to use tool that can help you in different situations.If you are using Drafting & Annotation workspace, probably you are using it. As Drafting & Annotation default workspace style. So if you are using Drafting & Annotation workspace then you can find Circle tool in Home tab.Click on it or enter Circle from your keyboard. As you can see Autocad asking us to specify a center point for circle or [Switch to other circle tools]If you are not drawing with coordinates then click by mouse left button in any workspace. In next step, Autocad will ask you enter Circle radius. By default when you drawing circle AutoCAD using Radius. But you can change radius to diameter.To change the radius to the diameter you can click mouse right button and from the menu choose Diameter or enter D  from the keyboard.After you will enter Radius or Diameter hit Enter to finish the command.If you give attention to Circle icon in tool ribbon then you can notice that under icon had a small arrow. If you will click on the arrow you will see different types of the circle. Under “Different types” I mean to draw a circle in a different way.
Here are different types of circles and how you can draw them.

Center, Radius – First specifying center then entering Radius

Center, Diameter – First specifying center then entering Diameter

2-Point – Specifying first point and then drawing line. Based on line length you will get radius of circle

3-point – Specifying first point and then second point. With third line point, you will specify radius of circle

Tan, Tan, Radius – This type of circle little bit complicated. If you have 2 different objects or corner then you can draw a circle between them. First, step you are defending first and second Tangent then entering radius of circle.

Tan, Tan, Tan – With this circle type you can draw a circle between 3 objects.

Rectangle Tool

It is use to draw a rectangle easily by giving dimensions.

To create a rectangle using dimensions:

1. On the command line, enter rectangle.
2. Specify the coordinate location for the first corner point.
3. Enter d to select the Dimensions option.
4. Enter a numeric value to specify the length for the rectangle. This value becomes the X direction value.
5. Enter a numeric value to specify the width for the rectangle. This value becomes the Y direction value.
6. Pick a point that defines the direction of the other (diagonal) corner point to place the rectangle and complete the command.