Derivation of the volume calculation formula of sphere by calculus

Derivation of the volume calculation formula of sphere by calculus

Circle: X & # 178; + Y & # 178; = R & # 178;, (note, R is a constant) x & # 178; = (R & # 178; - Y & # 178;) - [1] slice area: a = π X & # 178; - [2] slice volume: δ v = a * δ y, δ v = π X & # 178; δ y, δ v = π (R & # 178;) - [2] slice volume: δ v = a * δ y, δ v = π X & # 178; δ y, δ v = π (R & # 178;)