→ 2 × Keliling alas + 3 × Tinggi
→ 2 × (25 + 20 + 10) + 3 × 15 cm
→ 2 × 55 + 45 cm
→ 110 + 45 cm
→ 155 cm (B.)
[tex]\purple{\boxed{\blue{\boxed{\green{\star{\orange{\ \: \: \mathcal{JK} \: \: \: {\green{\star}}}}}}}}} [/tex]
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→ 2 × Keliling alas + 3 × Tinggi
→ 2 × (25 + 20 + 10) + 3 × 15 cm
→ 2 × 55 + 45 cm
→ 110 + 45 cm
→ 155 cm (B.)
[tex]\purple{\boxed{\blue{\boxed{\green{\star{\orange{\ \: \: \mathcal{JK} \: \: \: {\green{\star}}}}}}}}} [/tex]