Turn the triangle so that the solid corner (the corner corresponding to the paper's center) is at the bottom. Divide the triangle into 3 equal sections, each with a 30 degree angle. The most accurate way to do this is to use a protractor. If you don't have a protractor, you can estimate the size of the sections as you do Steps 5 and 6.
To make the sun's round center, draw a circle on yellow paper. Make the circle slightly smaller than the twelve-rayed sun. You can easily draw a circle using a compass. If you don't have a compass, find a plate or bowl that fits inside your paper sun. Draw a circle by tracing around the edges of the plate or bowl.
Cut out the yellow circle. Glue it at the center of the sun.