To long bantu jawab.... Dan to long pake Cara kerja ya pliseeeeee

Jawab :
DF = 4 cm , maka DF = 16 cm

CF/DF = CE/AD
4/16 = CE/20
1/4 = CE/20

4CE = 20
CE = 5 cm

Jadi BE = 20 + 5
             = 25 cm

Luas ΔABE = 1/2 x AB x BE
                   = 1/2 x 20 x 25
                   = 250 cm²


Semoga membantu

[tex]ce \: = \frac{4}{16} \times 20 = 5 \\ be = 20 + 5 = 25 \\ luas = \frac{20 \times 25}{2} \\ = 250[/tex]