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60= 4 x panjang sisi
60/4 = panjang sisi
15 = panjang sisi
panjang diagonal 2 = 18 (pakai pytagoras)
L = 1/2 * d1 * d2
= 1/2 * 24 * 18
= 216 cm2
pnjg salah satu diagonal = 24:2 = 12
jdi tinggal pke rumus phytagoras = (15x15)-(12x12) = akar 81
akar kuadrat 81 itu 9
karena diagonal ad 2 jdi 9x2 =18
rumus kell belah ketupat= (d1xd2) ÷ 2
= (24x18) ÷ 2
=432÷2
=216