ABCD Dörtgeninde Alan Hesabı

6. ABCD dörtgen, $[AB] \perp [BC]$, $[AB] \parallel [DE]$, $|DE| = 4$ cm, $|BC| = 18$ cm. Yukarıdaki verilere göre, Alan(AECD) kaç $cm^2$ dir? A) 24 B) 32 C) 36 D) 48 E) 72

Soruda görsel içerik var: A geometric figure shows a quadrilateral ABCD. AB is perpendicular to BC at B. A line segment DE is drawn parallel to AB, starting from point D on side AD to point E on the diagonal AC. The length of DE is given as 4 cm, and the length of the base BC is given as 18 cm. The region bounded by vertices A, E, C, and D is shaded. The diagram also indicates that AB is perpendicular to BC with a square symbol.