[Ipe-discuss] Drawing a circle onto an existing tangent

[Jan Hlavacek]

On Sat, Nov 21, 2009 at 11:41:51PM +0100, Alexander Wolff wrote:
> ahoj ondro,

Ahoj Ondro,

> with ipe 6 you could proceed as follows:

you can do the same in Ipe 7.

> 
> 1. select the line (segment), then the first point, click on Ipelets ->
> Goodies -> Make parabolas.
> 
> 2. select the line (segment), then the second point, click on Ipelets ->
> Goodies -> Make parabolas.

In fact, you can select the segment and both points, at the same time, click on
Ipelets->Goodies->Make parabolas, and both parabolas will be drawn at the same
time. 

> if your line segment is long enough, the two parabolic arcs intersect.
> the (only) intersection point is the center of the circle that goes
> through the two points and is tangent to the line.

-- 
Jan Hlavacek (jhlavace at svsu.edu, (989) 964-2004)
Department of Mathematical Sciences, Saginaw Valley State University
http://www.svsu.edu/~jhlavace/