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5) V limas = ⅓ x luas alas x tinggi
= ⅓ x (15 x 12) x t
= ⅓ x 180 x t
= 60t cm³ (tinggi limas tidak diketahui)
2) L lingkaran = π r²
= 22/7 x 7²
= 22/7 x 49
= 154 cm²
1) Phytagoras
a² + b² = c²
12² + 9² = c²
144 + 81 = c²
c² = 225
c = √225
c = 15 cm
Jadi x adalah 15 cm