diff --git a/canvas-arc.html b/canvas-arc.html
index ead0d19..0f733be 100644
--- a/canvas-arc.html
+++ b/canvas-arc.html
@@ -35,8 +35,8 @@
     <a id="twitterLink" href="https://github.com/Renkon65" target="_blank">
       <img src="image/iconGithubrenkonHtml.png" alt="github Link Image" width="100">
     </a>
-        </div>
-        <div class="global-nav"> -->
+        </div> -->
+        <div class="global-nav">
         <ul>
             <li><a class="button" href="rotation.html">回転</a></li>
             <li><a class="button" href="pythagorean-theorem.html">三平方の定理</a></li>