topic Re: How to find the tangency without tan/tan/radius in AutoCAD Forum

How to find the tangency without tan/tan/radius

jcasey7460 — Mon, 16 Mar 2020 11:04:15 GMT

I'm going through a chapter in my textbook called geometric construction. It's been helpful so far. I've discovered I can find many values that aren't given by using these geometry techniques.

Question...how would you find the tangency of the two yellow circles, given their radius, using geometric construction (without using tan/tan/radius)?

Screenshot and .dwg attached....Thanks to everyone for help with the past drawings. I do realize this is probably technical drawing 101...I"m slowly getting better at this, at least I think I am.... 😅

Re: How to find the tangency without tan/tan/radius

Kent1Cooper — Mon, 16 Mar 2020 11:48:40 GMT

Offset the two Circles that the yellow ones are to be tangent to, by the radius of each yellow one, and an intersection of the Offset results will be the center of a yellow Circle.

Re: How to find the tangency without tan/tan/radius

imadHabash — Mon, 16 Mar 2020 12:12:07 GMT

Hi,

as seen below you can by Parametric GCTANGENT command get such a service that may help . depending on your available data you can decide which Parametric constrain you will need .

Re: How to find the tangency without tan/tan/radius

jcasey7460 — Mon, 16 Mar 2020 12:18:40 GMT

OMG, that's perfect! Thank you @Kent1Cooper ....and to think I struggle with this for hours yesterday, makes me feel really dumb. LOL I also understand why that's done for the most part...this is fun but it can tough when you get stuck like that..it makes perfect sense why you did that though...very logical. Thanks again!

Re: How to find the tangency without tan/tan/radius

jcasey7460 — Mon, 16 Mar 2020 12:20:53 GMT

Nice, that is interesting. We are just starting the Parametric commands this week so this is great that you've mentioned that. I will check this out today. Thank you!