#### Topic: How to name the circles enclosed and described - parallel?

Hello! I do not know, likely nevertheless here correctly I write It is possible to construct two straight lines, parallel set, with identical offset. They will be parallel, and operation: "". It is possible to construct two circles which centers coincide with center of the given circle, and radiuses - accordingly it is more or less radius of the given circle on identical delta. How to name such circles, and how to name operation? Generally, by the way, it can be not circles, and any figures - squares, polygons, and .

#### Re: How to name the circles enclosed and described - parallel?

Hello, Marty, you wrote: If centers coincide, it is circles concentric.

#### Re: How to name the circles enclosed and described - parallel?

Hello, smeeld, you wrote: S> If centers coincide, it is circles concentric. About, precisely, it. And generally, when one figure is enclosed in another, and all edges on identical removal from the basic? Thus, depending on removal, similarity can be broken (for nested figures, for describing all )

#### Re: How to name the circles enclosed and described - parallel?

Hello, Marty, you wrote: M> And generally when one figure is enclosed in another, and all edges on identical removal from the basic? Parallel curves - and are called. Well and in mathematical morphology there are somewhat related operations: delation and erosion.

#### Re: How to name the circles enclosed and described - parallel?

Hello, watchmaker, you wrote: M>> And generally when one figure is enclosed in another, and all edges on identical removal from the basic? W> parallel curves - and are called. W> well and in mathematical morphology there are somewhat related operations: delation and erosion. Thanks