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Luas Bangun = Luas I ( Trapesium ) + Luas II ( Segitiga )
= 130 + 4,5
= 134,5 Cm²
Luas I = × ( s1 + s2 ) × t
= × ( 3 + ( 10 + 3 + 10 ) ) × 10
= × ( 3 + 23 ) × 10
= × 26 × 10
= 13 × 10
= 130 Cm²
Luas II = × Alas × Tinggi
= × 3 × 3
= × 9
= 4,5 Cm²