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kąt DAS = (180 - 30)/2 = 75 stopni
kąt BAS = 90 - 75 = 15 stopni
trójkąt ABC: a/16 = cos15
ODP. C: a=16cos15
4. Kąt CDE = 180 - 120 = 60 stopni
|CD|= 12
h/12=sin60
h=12*(√3)/2 = 6√3, ODP B.