AutoCAD 2018 and Inventor 2018 Tutorial By Tutorial Books (www.engbookspdf.com)

Part 1: AutoCAD Basics
Example 1 (3-Point)
In this example, you will create an arc by specifying
three points. The arc will pass through these points.
Open the Line-example1.dwg file.
Expand the Draw panel in the Home tab
and select the Multiple Points tool.
Example 2 (Start, Center, End)
In this example, you will draw an arc by specifying
its start, center and end points. The first two points
define the radius of the arc and third point defines
its included angle.
Type 100,120 in the command line and
press ENTER. This places a point above the
rectangle.
Click Home > Draw > Arc > Start, Center,
End on the ribbon. The message, “Specify
start point of arc or [Center]:” appears in
the command line.
The included angle of the arc is measured in
the counter-clockwise direction. Press and
hold the Ctrl key, if you want to reverse the
direction.
Click the down arrow next to the Object
Pick an arbitrary point in the graphics
Snap
icon on the status bar, and then
window to define the start point of an arc.
select the Node option from the menu.
Click Home > Draw > Arc > 3-Point on the
ribbon. The message, “Specify start point of
arc or [Center]:” appears in the command
line.
Select the top left corner of the rectangle.
Select the point located above the rectangle.
Select the top right corner of the rectangle;
the three-point arc will be created.
The message, “Specify center point of arc:”
appears.
Pick a point to define the radius of the
circle. You can also type-in the radius value
and press ENTER; the message, “Specify
end point of arc or [Angle/chord Length]:”
appears.
You will notice that, as you move the
pointer, the included angle of the arc
changes.
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