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

Part 1: AutoCAD Basics
Rotate Items buttons are active. Next, click
the Close Array button on the ribbon.
Click Home > Modify > Offset on the
ribbon or enter O in the command line.
Click the Trim button on the Modify panel.
Press ENTER to select all objects as cutting
edges.
Trim the unwanted portions as shown
Type 20 as the offset distance and press
ENTER.
Select the polyline loop.
Click outside the loop to create the parallel
copy.
below.
The Offset tool
The Offset tool creates parallel copies of lines,
polylines, circles, arcs and so on. To create a parallel
copy of an object, first you must define the offset
distance, and then select the object. Next, you must
define the side in which the parallel copy will be
placed.
Select Exit from the command line.
Click Home > Layers > Layer Properties on
the ribbon (or) type LA in the command
line; the Layer Properties Manager appears.
Click the New layer button on the Layer
Properties Manager. Enter Centerline in the
Name field.
Create the drawing shown below using the
Polyline tool. Do not add dimensions.
Click the Set current icon. This activates
the new layer.
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