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Persegi=s×s=25×25=625 cm2
Luas segitiga+persegi= 225+625=850 jadi jawabannya d
= 25× 25 = 625 cm
luas segitiga= a× t/2
= 25×18/2
= 450/2 =225 cm
luas gabungan =625 + 225 cm= 850 cm ( d)
jadikan saya jawaban tercerdas