Question 179752
Create a graph with four odd vertices 
Can you show me please???
<pre><font size = 4 color = "indigo"><b>

Start with a rectangle. A rectangle has 4 EVEN vertices,

{{{drawing(200,200,1.5,4.5,.5,5.5, rectangle(2,2,4,4) )}}}

one at each of the 4 corners for there are two lines coming 
together at each of the 4 corners, and 2 is an EVEN number.
Now if we add a curved line at the top and another at the 
bottom as shown below, there will be three lines 
coming together at each corner. And since 3 is ODD, these
4 corners of the rectangle are now 4 ODD vertices:

{{{drawing(200,200,1.5,4.5,.5,5.5, rectangle(2,2,4,4),
     graph(200,200,1.5,4.5,.5,5.5,4+sqrt(1-(x-3)^2)),
     graph(200,200,1.5,4.5,.5,5.5,2-sqrt(1-(x-3)^2)) )}}}

Edwin</pre>