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OpenStudy (amz99):
Q) A long time ago Dulani found an island shaped like a triangle with three straight shores of length 3km, 4km and 5km, He said nobody could come within 1km of his shore. What was the area of his exclusion zone?
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Directrix (directrix):
From @StephenLaRocque http://mathcentral.uregina.ca/QQ/database/QQ.09.07/h/awrongo1.html @amz99
Directrix (directrix):
Also, from @jim_thompson5910 http://openstudy.com/study#/updates/513c2f5ce4b01c4790d24e63
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