Question 1071512
{{{AB=AC}}}
{{{AE+BE=AF+CF}}}
Since E and F are the midpoints,
{{{AE=BE}}} and
{{{AF=CF}}}
So then substituting,
{{{BE+BE=CF+CF}}}
{{{2*BE=2*CF}}}
Dividing both sides by 2,
{{{BE=CF}}}