<p>60</p>

<p>75</p>

<p>150</p>

<p>192</p>

<p>32</p>

<p>64</p>

<p>56</p>

<p>40</p>

<p>20</p>

<p>24</p>

<p>28</p>

<p>48</p>

<p>30 cm</p>

<p>40 cm</p>

<p>50 cm</p>

<p>72</p>

<p>144</p>

<p>288</p>

<p>16 cm</p>

<p>20 cm</p>

<p>24 cm</p>

<p><span> </span></p><div class="katex-container" data-idx="0" content-editable="false"> <span class="katex-display" style=""><span class="katex" style=""><span class="katex-mathml"><math><semantics><annotation encoding="application/x-tex">\frac{1}{2}</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height: 2.00744em; vertical-align: -0.686em;"></span><span class="mord"><span class="mopen nulldelimiter"></span><span class="mfrac"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height: 1.32144em;"><span style="top: -2.314em;"><span class="pstrut" style="height: 3em;"></span><span class="mord"><span class="mord">2</span></span></span><span style="top: -3.23em;"><span class="pstrut" style="height: 3em;"></span><span class="frac-line" style="width: 8.66667px; border-bottom-width: 0.04em;"></span></span><span style="top: -3.677em;"><span class="pstrut" style="height: 3em;"></span><span class="mord"><span class="mord">1</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height: 0.686em;"></span></span></span></span><span class="mclose nulldelimiter"></span></span></span></span></span></span> diagonal 1 x diagonal 2</div><p></p>

<p>diagonal 1 x diagonal 2</p>

<p>2πr</p>