Jawaban:
C. 15 cm
Penjelasan dengan langkah-langkah:
[tex] EF = \frac{(DC . AE) + (AB . DE)}{AE + DE} \\ = \frac{(12 \times 4) + (18 \times 4)}{4 + 4} \\ = \frac{48 + 72}{8} \\ = \frac{120}{8} \\ = 15 \: cm[/tex]
Semoga membantu;)
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Jawaban:
C. 15 cm
Penjelasan dengan langkah-langkah:
[tex] EF = \frac{(DC . AE) + (AB . DE)}{AE + DE} \\ = \frac{(12 \times 4) + (18 \times 4)}{4 + 4} \\ = \frac{48 + 72}{8} \\ = \frac{120}{8} \\ = 15 \: cm[/tex]
Semoga membantu;)