Lista de exercícios do ensino médio para impressão
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Find x in the following cases:
a) s is perpendicular to $\;\overline{AB}\,$
circle of center O with chord AB and line s perpendicular to AB
b) $\,\overline{PA}\,$ and $\,\overline{PB}\,$ are tangent segments to the circle
external point P intersection of two tangent segments to the circumference with center O

 



answer: a) 6b) 9
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