Update documentation

Author: AllenDowney

_sources/chap04.ipynb

@@ -1581,7 +1581,7 @@
    "id": "8b8faaf6",
    "metadata": {},
    "source": [
-    "## Exercise\n",
+    "### Exercise\n",
     "\n",
     "Write a function called `rhombus` that draws a rhombus with a given side length and a given interior angle. For example, here's a rhombus with side length `50` and an interior angle of `60` degrees."
    ]

chap04.html

@@ -377,13 +377,11 @@ <h2> Contents </h2>
 <li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#glossary">4.10. Glossary</a></li>
 <li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#exercises">4.11. Exercises</a><ul class="nav section-nav flex-column">
 <li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#exercise">4.11.1. Exercise</a></li>
-</ul>
-</li>
-<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#id1">4.12. Exercise</a><ul class="nav section-nav flex-column">
-<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id2">4.12.1. Exercise</a></li>
-<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id3">4.12.2. Exercise</a></li>
-<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id4">4.12.3. Exercise</a></li>
-<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#ask-a-virtual-assistant">4.12.4. Ask a virtual assistant</a></li>
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id1">4.11.2. Exercise</a></li>
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id2">4.11.3. Exercise</a></li>
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id3">4.11.4. Exercise</a></li>
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id4">4.11.5. Exercise</a></li>
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#ask-a-virtual-assistant">4.11.6. Ask a virtual assistant</a></li>
 </ul>
 </li>
 </ul>
@@ -1274,9 +1272,8 @@ <h3><span class="section-number">4.11.1. </span>Exercise<a class="headerlink" hr
 </svg></div></div>
 </div>
 </section>
-</section>
 <section id="id1">
-<h2><span class="section-number">4.12. </span>Exercise<a class="headerlink" href="#id1" title="Link to this heading">#</a></h2>
+<h3><span class="section-number">4.11.2. </span>Exercise<a class="headerlink" href="#id1" title="Link to this heading">#</a></h3>
 <p>Write a function called <code class="docutils literal notranslate"><span class="pre">rhombus</span></code> that draws a rhombus with a given side length and a given interior angle. For example, here’s a rhombus with side length <code class="docutils literal notranslate"><span class="pre">50</span></code> and an interior angle of <code class="docutils literal notranslate"><span class="pre">60</span></code> degrees.</p>
 <div class="cell tag_remove-input docutils container">
 <div class="cell_output docutils container">
@@ -1299,8 +1296,9 @@ <h2><span class="section-number">4.12. </span>Exercise<a class="headerlink" href
 
 </svg></div></div>
 </div>
+</section>
 <section id="id2">
-<h3><span class="section-number">4.12.1. </span>Exercise<a class="headerlink" href="#id2" title="Link to this heading">#</a></h3>
+<h3><span class="section-number">4.11.3. </span>Exercise<a class="headerlink" href="#id2" title="Link to this heading">#</a></h3>
 <p>Now write a more general function called <code class="docutils literal notranslate"><span class="pre">parallelogram</span></code> that draws a quadrilateral with parallel sides. Then rewrite <code class="docutils literal notranslate"><span class="pre">rectangle</span></code> and <code class="docutils literal notranslate"><span class="pre">rhombus</span></code> to use <code class="docutils literal notranslate"><span class="pre">parallelogram</span></code>.</p>
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 <div class="cell_output docutils container">
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 </div>
 </section>
 <section id="id3">
-<h3><span class="section-number">4.12.2. </span>Exercise<a class="headerlink" href="#id3" title="Link to this heading">#</a></h3>
+<h3><span class="section-number">4.11.4. </span>Exercise<a class="headerlink" href="#id3" title="Link to this heading">#</a></h3>
 <p>Write an appropriately general set of functions that can draw shapes like this.</p>
 <p>Hint: Write a function called <code class="docutils literal notranslate"><span class="pre">triangle</span></code> that draws one triangular segment, and then a function called <code class="docutils literal notranslate"><span class="pre">draw_pie</span></code> that uses <code class="docutils literal notranslate"><span class="pre">triangle</span></code>.</p>
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 </div>
 </section>
 <section id="id4">
-<h3><span class="section-number">4.12.3. </span>Exercise<a class="headerlink" href="#id4" title="Link to this heading">#</a></h3>
+<h3><span class="section-number">4.11.5. </span>Exercise<a class="headerlink" href="#id4" title="Link to this heading">#</a></h3>
 <p>Write an appropriately general set of functions that can draw flowers like this.</p>
 <p>Hint: Use <code class="docutils literal notranslate"><span class="pre">arc</span></code> to write a function called <code class="docutils literal notranslate"><span class="pre">petal</span></code> that draws one flower petal.</p>
 <div class="cell tag_remove-input docutils container">
@@ -3405,7 +3403,7 @@ <h3><span class="section-number">4.12.3. </span>Exercise<a class="headerlink" hr
 </div>
 </section>
 <section id="ask-a-virtual-assistant">
-<h3><span class="section-number">4.12.4. </span>Ask a virtual assistant<a class="headerlink" href="#ask-a-virtual-assistant" title="Link to this heading">#</a></h3>
+<h3><span class="section-number">4.11.6. </span>Ask a virtual assistant<a class="headerlink" href="#ask-a-virtual-assistant" title="Link to this heading">#</a></h3>
 <p>There are several modules like <code class="docutils literal notranslate"><span class="pre">jupyturtle</span></code> in Python, and the one we used in this chapter has been customized for this book.
 So if you ask a virtual assistant for help, it won’t know which module to use.
 But if you give it a few examples to work with, it can probably figure it out.
@@ -3520,13 +3518,11 @@ <h3><span class="section-number">4.12.4. </span>Ask a virtual assistant<a class=
 <li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#glossary">4.10. Glossary</a></li>
 <li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#exercises">4.11. Exercises</a><ul class="nav section-nav flex-column">
 <li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#exercise">4.11.1. Exercise</a></li>
-</ul>
-</li>
-<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#id1">4.12. Exercise</a><ul class="nav section-nav flex-column">
-<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id2">4.12.1. Exercise</a></li>
-<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id3">4.12.2. Exercise</a></li>
-<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id4">4.12.3. Exercise</a></li>
-<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#ask-a-virtual-assistant">4.12.4. Ask a virtual assistant</a></li>
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id1">4.11.2. Exercise</a></li>
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id2">4.11.3. Exercise</a></li>
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id3">4.11.4. Exercise</a></li>
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#id4">4.11.5. Exercise</a></li>
+<li class="toc-h3 nav-item toc-entry"><a class="reference internal nav-link" href="#ask-a-virtual-assistant">4.11.6. Ask a virtual assistant</a></li>
 </ul>
 </li>
 </ul>