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d1 = 16 cm
Maka cari d2:
L = 1/2 × 16 × d2
96 = 8 × d2
d2 = 96/8
d2 = 12 cm
Cari sisinya (s)
s = √(12/2)² + (16/2)²
s = √6² + 8²
s = 10 cm
Keliling
K = 4s
K = 4(10)
K = 40 cm
Harap membantu.... :)