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= (p x l) + (p x l) = (10 x 8) + (12 x 5) = 80 + 60 = 140 cm²
6.) L.lingkaran = phi x r² = 3,14 x 10,5² = 346,185 cm²
8.) Volume kubus = r³ = 11³ = 1331 cm³
9.) L.alas prisma = Volume : tinggi = 168 : 14 = 12 cm²
1.) Sisi = Keliling : 4 = 116 : 4 = 29 cm
Luas = s² = 29² = 841 cm²
2.) Luas persegi panjang = p x l = 60 x 45 = 2700 m²
Ok,itu jawabanya.......^_~
7
=231 × 10.5 cm
7
=2425.5 cm
7
=346.5 cm²