[b]Case:[/b] [i]Three points and two tangents are given.[/i]
Using involution*, the points of tangency can be located. I then know [i]five points[/i], a case I can solve (http://www.geogebratube.org/material/show/id/213219).
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*Construction of the double points used in this worksheet: [url]http://www.geogebratube.org/material/show/id/243957[/url]