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persegi
s = 36 cm
segitiga
a = 28 + 36
= 64 cm
t = 60 - 36
= 24 cm
L seluruhnya = L persegi + L segitiga
= s x s + ½ x a x t
= 36 x 36 + 64 x 24 : 2
= 1296 + 768
= 2.064 cm²
semoga membantu :)
maaf kalau salah