You're Working, but You Haven't Done the Answer?

i hope, hope people have been drawing along with us. What you want to do is be able to do em those triangles with curved sides that you can see from the middle circle. If you can find the areas of those triangle with curved sides, and subtracting from from the middlecircle, you'll get the shaded area. And what's the answer? That's the working? Well, see, you show you're working, but you haven't given me the answer.