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Verified answer
Diketahui:AB = 24 cm
BC = 20 cm
AF = BF = 24/2 = 12 cm
L jajargenjang BDEC = 240 cm^2
Ditanya:
BD = ?
Jawab:
CF^2 = BC^2 - BF^2
CF^2 = 20^2 - 12^2
CF^2 = 400 - 144
CF^2 = 256
CF = √256
CF = 16 cm
L jajargenjang BDEC = alas x tinggi
240 = BD x CF
240 = BD x 16
240/16 = BD
15 = BD
Jadi, panjang BD adalah 15 cm.
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