AB=BC,
(B1C)^2=(BC)^2-(BB1)^2=100-64=36 => B1C=6
|BB1-AB-CB1|=|8-10-6|=|-8|= 8cm
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AB=BC,
(B1C)^2=(BC)^2-(BB1)^2=100-64=36 => B1C=6
|BB1-AB-CB1|=|8-10-6|=|-8|= 8cm