Whakaoti i te A=2pirh+2pir^2

$$A = 2 \pi r h + 2 \pi r ^ { 2 }$$

Whakaoti mō h

$$\left\{\begin{matrix}h=\frac{A-2\pi r^{2}}{2\pi r}\text{, }&r\neq 0\\h\in \mathrm{R}\text{, }&A=0\text{ and }r=0\end{matrix}\right.$$

Ngā Upane mō te Whakaoti Whārite Rārangi

Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.

$$2\pi rh+2\pi r^{2}=A$$

Tangohia te 2\pi r^{2} mai i ngā taha e rua.

$$2\pi rh=A-2\pi r^{2}$$

Whakawehea ngā taha e rua ki te 2\pi r.

$$\frac{2\pi rh}{2\pi r}=\frac{A-2\pi r^{2}}{2\pi r}$$

Mā te whakawehe ki te 2\pi r ka wetekia te whakareanga ki te 2\pi r.

$$h=\frac{A-2\pi r^{2}}{2\pi r}$$

Whakawehe A-2\pi r^{2} ki te 2\pi r.

$$h=-r+\frac{A}{2\pi r}$$

Whakaoti mō A

$$A=2\pi r\left(r+h\right)$$