triangel top=(3,4)
bottom av triangel=line from (-2,-4) tu (-6,8)
so mid point av side 3=(-4,+2)
yu need line from (3,4) tu (-4,2), so delta x=-7 & deltay=-2
yer line point mostlee left, but down a littel...quadrant 4, angel 180+sumthun
yuzer invers tan (2/4) tu get that angel...invers tan(0.5)=26.56505117707799 deg
add 180 & yu get 206.56505117707799 deg