May you please tell me how to edit this Illustrator file?

Question

I am kindly asking you to assisting me editing an image. https://www.dropbox.com/s/s9no77jfag62vsi/padder3Core.ai?dl=0
As you can see, there are 4 colors (red, blue, yellow, light gray). I am struggling to find a way to delete the grey color and to stretch the other three colors enough to form a sort of equilateral triangle. Let me explain.
At the moment, each of the four colors form a 90 degrees angle. Is there any way to delete the light grey color and make space to the other three colors so that they form a 360 degrees angle? (120 degrees each).
Thank you so much in advance,
Cesare

Answer 1

Cesare,
What appears in the expanded Layers palette when you have the selection shown in the Dropbox screenshot?
It should be the three thirdendeal circles, in a Group unless Ungrouped. Each should be selectable.
Before posting, I tried the Pathfinder Divide with the Radial Dividers, and it worked.
If the Radial Dividers are too short to reach the circle (so there are gaps), it will be a Compound Path instead. I believe(d) that issue to only apply to rather old versions (before CS (1) or something).
One way to get round an issue with too short Radial Dividers is to create the Polar Grid a bit too large and reduce the size of the circle to the desired value, and then to Pathfinder>Divide (the outlying ends of the dividers will disappears); in cases with an even number of dividers you may alternatively create the Polar Grid at the final size and increase the size of the divider group.
If there is such an issue, the easy solution is Shapebuilder/Live Paint with Gap Detection, of course.