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 or trace around the mouth of a bowl or small plate.
Cut out the yellow circle. Glue it at the center of the sun.