1. 表面积公式
表面积公式
<span class="equation-text" contenteditable="false" data-index="0" data-equation="S = 2S_{\text{底}} + C_{\text{底}} \cdot h"><span></span><span></span></span>（<span class="equation-text" contenteditable="false" data-index="0" data-equation="C_{\text{底}}"><span></span><span></span></span>为底面周长）
<span class="equation-text" contenteditable="false" data-index="0" data-equation="S = S_{\text{底}} + \frac{1}{2} C_{\text{底}} \cdot l"><span></span><span></span></span>（<span class="equation-text" contenteditable="false" data-index="0" data-equation="l"><span></span><span></span></span>为斜高）
<span class="equation-text" contenteditable="false" data-index="0" data-equation="S = 2\pi r^2 + 2\pi r h"><span></span><span></span></span>
<span class="equation-text" contenteditable="false" data-index="0" data-equation="S = \pi r^2 + \pi r l"><span></span><span></span></span>（<span class="equation-text" contenteditable="false" data-index="0" data-equation="l"><span></span><span></span></span>为母线长，<span class="equation-text" contenteditable="false" data-index="0" data-equation="l = \sqrt{r^2 + h^2}"><span></span><span></span></span>）
<span class="equation-text" contenteditable="false" data-index="0" data-equation="S = \pi (r_1^2 + r_2^2) + \pi (r_1 + r_2) l"><span></span><span></span></span>
