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  1. #1
    Forum Newbie FCspecial's Avatar
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    Question Perpendicular lines

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    Hi to all!

    I'm new to AutoCad and I get better every time I use it. And yes there will always be questions and I came upon this site by chance and I'm glad I did.

    Simple question: how do you draw a perpendicular line to a line on any angle other than in ORTHO? I've looked in this site and in my AutoCad for Dummies book with no results, any advise would greatly be appreciated.

    Thanks Frank

  2. #2
    Super Moderator Strix's Avatar
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    hi, and welcome to the CADTutor forum

    there are an assortment of ways, depending on what you're aiming to achieve

    you can draw a line perpendicular to another by selecting the start point away from the line, selecting the 'perpendicular' point snap and selecting the line you wish to be perpendicular to

    you can use a similar method by setting your OSNAPS to include 'perpendicular', begin your line, select the line you wish to be perpendicular to, then tab through the available osnaps until the perpendicular symbol appears

    if you wish to draw perpendicular from... somebody else will have to tell you how to do it
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    There's always polar tracking.

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    keep 'polar' & 'otrack' both on in your tile boar at the bottom of the drawing screen.
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    You can use the SNAPANG function to set your crosshairs to match a line that is at an angle other exactly horizontal or vertical. Then you can draw a line perpendicular to or from that line. Reset your crosshairs back to "0" using SNAPANG again.
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    Forum Newbie FCspecial's Avatar
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    Thank you for the heads up

    Your advise did help

  7. #7
    Junior Member Stangman's Avatar
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    If you want to go perpendicular from a line or object you need to hold Shift+Right click or CTRL+Right click and choose Perpendicular snap. Then choose a starting point.

    If you want to end up perpendicular to an object you'll need to do those same steps; however, instead pick a starting point first, and then choose the Perp. Snap before picking an end point.

    In drafting, I don't like to rely simply on my polar tracking to go perpendicular to something that isn't either horizontal, vertical, or 45 degrees, because you just never know if its exact. You could be off by only a fraction of a degree, but that build up of error could end up being several feet off for very large distances.
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