21. Write a Flow-Chart proof.
Given: BC = EC and AC = DC
Prove: BA ED
                                             
                                          
                                          
                                        
											 
											Answer:
BC=EC(GIVEN)
AC=DC(GIVEN)
<BCA=<DCE(VERTICAL OPPOSITE ANGLE)
BCA=DCE(BY SAS CRITERIA)
BA=DE(BY CPCT )