4/09 8PM I forgot about Ben's last hint for Problem 5. But I'm not su…

…re I could connect them in a way that wouldn't be confusing. Any configuration of four points with D included will be not co-planar, but if you connect them, your mind can still perceive them as being a quadrilateral, which can be put on a plane.


Instead, I'll add a second hint about connecting three points at a time to form triangles, and then asking if those triangles are co-planar.

exercises/points_lines_and_planes.html

@@ -563,7 +563,9 @@
 
 				<div class="hints">
 				<p> Coplanar points are points that lie on the same plane.</p>
-				<p> Can a flat surface pass through the points without bending? </p>
+				<p> Pick three of the points and connect them. Pick another three and connect them. <BR>
+				Do both of the triangles lie on the same plane? </p>
+				<p> Can a flat surface pass through all the points without bending? </p>
 				</div>
 		</div>