Fractional Geometry

Here's a little geometry and fraction summer fun I learned at a workshop today. Assuming the yellow octagon equals one whole, what is the fraction for all the pieces in the left picture and what is the fraction of all the pieces in the right?
How do you know?
I still care about all of you. I still want you to use those wonderful brains of yours. I can't tell you how impressed I was with your class performance on the FCAT!
Labels: AIMS workshop, elementary education, fractions, geometry, OCPS, summer math