Dentro de um grande círculo, desenhe dois círculos menores, um internamente tangente no ponto A e o outro internamente tangente no ponto B. Então, desenhe a tangente exterior comum CD. Onde as linhas AC e BD se interceptam?
(Inside a large circle, draw two smaller circles, one internally tangent at point A and the other internally tangent at point B. Then, draw the common exterior tangent CD. Where do the lines AC and BD intercept each other?)
PCFilho
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ResponderExcluirWhere lines AC and BD intersect depends on which common tangent line you draw, as the two smaller circles have four possible common tangent lines.
ResponderExcluirTrue. Let's define "exterior tangent" as the tangent line drawn in the figure. :)
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ResponderExcluirI'm thinking that the lines intersect on the circle.
ResponderExcluirYes, Jake! The lines intersect exactly on the circle. :)
ExcluirIs there going to be a detailed explanation as to why?
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