im confused on this ;-;

Hello heartSTORM907!

There is no result for the distance BC.

$\overline{BC}\in \{\}\\ \sum(\ \overline{BC}\ )=0\ as\ specified\ in\ the\ task.$

  !.

OH MY GOD i almost completely forgot about that part.... i kept thinking i was doing something wrong lol

thank you so so so much!!!!

angle BCA =  30°

Using the Law of Sines

sin BCA / AB  = sin ABC / 10

sin (30°) / 4 =  sin ABC /10

(1/2) / 4  = sin ABC /10

(1/8)  = sin ABC  /10

(10/8) = sin ABC

(5/4)  = sin ABC        { impossible}