Great way to create a pizza icon with out having to draw each slice. The key to this is the Polar Grid Tool and the ability to create rings and dividers quickly.
Select the Polar Grid Tool that is nested in with the line tools, then click on the document to open this dialog box. Choose 6 dividers for radial and 6 dividers for concentric. Click OK.
Select the Polar Grid and choose Object>Ungroup.
Select the outer most ring and delete it. (The outer ring doesn't divide correctly which is why it gets deleted.)
Delete all the inner rings, leaving just the 2 rings shown.
Select remaining components and choose the divide function in the Pathfinder Panel.
Select one slice and slide it out of the overall shape.
Add a heavier stroke to all the lines.
Add some circles.
Add some lines with rounded ends, and some arcs as well for texture.
Draw a rectangle to start the cheese drips.
Use the Direct Selection Tool to select the bottom edges and pull the Corner Widgets into the center.
Duplicate the shape, then add a rectangle on the top of both shapes. Select all the shapes
Use the Pathfinder Unite to make them all one shape.
Use the Direct Selection Tool to select the inner corners of the center and round the edges.
Use the Direct Selection Tool to angle the top of the graphic to match the edge of the slice. Move the drips into position
Select the drip and the slice and use the Pathfinder Unite mode to combine the two shapes together.
Add color to the areas as you like.
Select the outer ring and copy the shape, click the Draw Inside Mode at the bottom of the Tool Bar. Paste the shape, remove the border, add a darker color fill, move it into position to create a slip shadow, then click on the Draw Normal mode.
Repeat the process with all the outer shapes and so the same with the inner wedges.
Go around the circle and do all the slices one-by-one. Takes a little time...
In the end you end up with a quick and easy pizza icon. Enjoy!