The steadier your hand while drawing, the less points you will have to deal with.
You can Zoom In closer to the shape by clicking on the + Sign in the bottom right corner of the screen.
Move your Cursor over any of the Points on a line except for the Endpoints.
The Cursor will change to a 4 Point Arrow.
Right click and select Delete Point from the menu that appears.
Not only does the Point disappear, but the Line also straightens a bit.
If at any time you deselect the Shape you will have to get back to the Edit Shape Menu.
Move your cursor over an Endpoint, hold the left mouse button down and drag upward to the Top Margin (the Blue Dotted Line). Repeat for the Endpoint on the right.
The Line is not perfect, but it is much straighter.
Spend a couple minutes removing the Points from the other 2 Lines.
Notice that there are 2 Points at each corner.
For each pair of Points, drag a Point above or to its Endpoint.
This is the enhanced Scribble Shape.
So you're probably wondering just why did we go through all of this trouble just to draw a Triangle. The reason is that we need to move these shapes around the entire flyer, manipulating some Endpoints as we go.
If you inserted a regular Triangle from the Shapes Menu, and then tried to use the Edit Shape Menu, you would see that the Edit Points option would not be available.
If you know of another solution, please feel free to let me know.