Merge pull request #16855 from qifei/patch-2

Docs: Explain the 2D contour

docs/api/en/extras/ShapeUtils.html

@@ -22,7 +22,7 @@
 
 		<h3>[method:Number area]( contour )</h3>
 		<p>
-		contour -- 2D polygon.<br /><br />
+		contour -- 2D polygon. An array of THREE.Vector2()<br /><br />
 
 		Calculate area of a ( 2D ) contour polygon.<br /><br />