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2014-06-11T14:05:30+03:00
ΔABC = ΔAEB
BC/BE = AC/AB => BE = BC*BA/AC

CB/CA = cos30° = 2/3 => CB = 2AC/3
AB/AC = sin 30° = 1/2 => AB = AC/2

BE = ( 2AC/3 * AC/2 ) / AC = 2/3 * 1/2 * AC = AC/3 = 24/3 = 8
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