Datrys ar gyfer A
A=\pi \left(r^{2}+R^{2}\right)
Datrys ar gyfer R (complex solution)
R=-\sqrt{-r^{2}+\frac{A}{\pi }}
R=\sqrt{-r^{2}+\frac{A}{\pi }}
Datrys ar gyfer R
R=\sqrt{-r^{2}+\frac{A}{\pi }}
R=-\sqrt{-r^{2}+\frac{A}{\pi }}\text{, }A\geq \pi r^{2}
Rhannu
Copïo i clipfwrdd
A=\pi R^{2}+\pi r^{2}
Defnyddio’r briodwedd ddosbarthu i luosi \pi â R^{2}+r^{2}.
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