@ @pbjïØ Üa@ @SP .1×4×2 = 8 . 4 + 8 = 12 ADBEC [AMC10A 2011] ( ) A CD EB 6 . . DA . : AC AE A )5 B 6A .D ( E 5D 1C .4 . 6 × 5 ×1× 5 × 4 = 600 DA C: 5B 6A .A ( B A )4 C .4E 4D . 6 × 5 × 4 × 4 × 4 = 1920 DA CA :