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a * t = a * t
AB * BE = BC * BF
10 * 8 = 16 * BF
80 = 16 * BF
80 / 16 = BF
BF = 5 cm
16. L. jjr gnjng = a * t
288 cm² = AD * BF
288 cm² = AD * 18
288 / 18 = AD
AD = 16
Kel. = 2AB + 2AD
= 2 * 36 + 2 * 16
= 72 + 32
= 104 cm
10 X 8 = 16 X BF
80 = 16 BF
BF = 80/16
BF = 5 CM