A_s = 4 \pi \left(\fraca2\right)^2 = 4 \pi \cdot \fraca^24 = \pi a^2 - AMAZONAWS

📅 March 11, 2026 👤 scraface

Mar 11, 2026

$A_s = 4 \pi \left(\frac{a}{2}\right)^2 = 4 \pi \cdot \frac{a^2}{4} = \pi a^2$