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= diagonal 1 = 400cm
= diagonal 2 = 4cm
= 1/2×400×4=
= 1/2×1.600
= 1.600 : 2 = 800cm semoga membantu ya..
caranya
800 : 2 = 400
cari bilangan yg hasil kalinya 400
kemungkinan banyak
40 x 10
16 x 25
20 x 20
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