



<B = 60o
<A = 180 — (90 + 66) = 30o
BC = AB/2
BC + AB = 26,4
AB = ?
AB = 2 * BC
BC + 2BC = 26,4
26,4 = 3BC
BC = 8,8
AB = 2 * 8,8 = 17,6


AB = BC = AC
<A = <B = <C = 60o
BD = DC = BC/2 = 12/2 = 6
MDC = ուղղանկյւոն եռանկյուն է
MC = CD/2 = 6/2 = 3
12 — 3 = 9