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luas 2 = 5X15 = 75 X2 =150
luas 3 = 12X15 = 180
luas 4 = menghitung tinggi bangun ruang dulu
c=√5²+3²
=4
luas 4= a+b/2 × t = 6+12/2 × 4 = 36 X2= 72
luas semua= 90+150+180+72 =492
I) 6 x 15 = 90 II) 5 x 15 = 75 x 2 =150 III) 12X15 = 180
IV) menghitung tinggi bangun ruang tersebut
c = √5²+3² = √25 - 9 = √16 = 4
luas 4= a+b/2 × t = 6+12/2 × 4 = 36 X2= 72
luas semua= 90+150+180+72 =492