Verify whether the points \(A(-20,-16)\), \(B(-8,0)\) and \(C(8,-12)\) make an isosceles triangle by satisfying AB=BC.  And, calculate the sides of the triangle using the distance formula.
 
The sides of the isosceles triangle:
 
\(AB =\) i.
 
\(BC =\) i.
 
\(AC =\) i.