Question 23422
{{{ graph( 300, 300, -5, 5, -5, 5, x+2,2-x,2) }}} 
LET THE TRIANGLE BE ABC WITH VERTEX AT A AND AB=AC.LET AD be THE MEDIAN...IN TRIANGLES ABD AND ACD ,WE HAVE 
AB=AC....GIVEN
AD=AD
BD=DC.....(AD IS MEDIAN)
HENCE THE 2 TRIANGLES ARE IDENTICAL OR CONGRUENT.