扇形面積計算機
輸入
結果
\begin{aligned} A &= \tfrac{1}{2} r^2 \theta \\ &= \tfrac{1}{2} (10\,\text{m})^2 (60^{\circ}) \\ &= ?\,\text{m²} \end{aligned}
\begin{aligned} l &= r\theta \\ &= (10\,\text{m})(60^{\circ}) \\ &= ?\,\text{m} \end{aligned}
\begin{aligned} c &= 2r \sin\!\left(\dfrac{\theta}{2}\right) \\ &= 2 \times 10\,\text{m} \times \sin\!\left(\dfrac{60^{\circ}}{2}\right) \\ &= ?\,\text{m} \end{aligned}
\begin{aligned} P &= l + 2r \\ &= ?\,\text{m} + 2 \times 10\,\text{m} \\ &= ?\,\text{m} \end{aligned}