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Verified answer
Kll belah ketupat = 4s80 = 4s
s = 80/4
s = 20
s sebagai sisi miring
P. diagonal = 24cm
sisi tegak siku siku = 24/2 = 12
untuk menentukan diagonal lain maka kita gunakan teori phytagoras dengan membentuk segitiga siku siku
= √20²-12² = √400-144 = √256 = 16
P. diagonal lain = 16×2 = 32cm
luas belah ketupat = ½×d1×d2
L = ½×24×32
L = 384cm²
semoga membantu