Respostas

2013-04-04T14:47:46-03:00

a = 2b

c = b

 

(2b)² = b² + c²

4b² - b² = c²

3b² = c²

c = b\sqrt{3}

 

senx = b\sqrt{3}/2b

\sqrt{3}/2

 

R > 60º

 

 

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