 This is a short film to show you how to use coproducts in making polyhedra. When you start with coproducts, you first you must move up your sleeves so that you don't have any materials like t-shirts in where they can get coproducts on them because rwy'n credu gyda'n gweld gwybod eich hynny. Rwy'n ddiwedd yn cydwyr a chyfodd beirio y gwybod, mae'n biwb'r cefnod i'r hyn ychydig i chi'n allanا i ti i'w dweud o'r ffordd llin o'r siarad ei chyfriedoedd. Y clywb, mae'n fwynt yr ydych yn gweld o gyfrifoldau ym mhwygr o'r eich cyfledd. Ac mae'n meddwl iawn ar y cyfwriad, mae'n meddwl eich rai'r buswch arall o'r plastig ar y cwestiynau. Mae'r gwaith bod o'r rai o'r awdur o'r gwaith ar gyfer gyda'r gerda'r hyfforddiad. A yna'n meddwl i'n meddwl i'n meddwl i'r cwestiynau o'r gwaith ar y cyfwriad. Llywodraeth, roi'r boblhedraeth, roi'n enwedig ychwanegu gydwch i'r ffordd. here I have two squares, I take one square, just one of them and dip it one edge into the copied x, making sure that it's covered and then push the two together and hold it. When I push the two together after a little time maybe a minute or so then it has made a hinge that will move backwards and forwards. So I'm starting to make a corner. If I wanted then to make this particular corner with two squares and a triangle I put the triangle in. If I want to make a cube I will put a third square in. So to make this cube I now need to glue two corners and I put two edges like that and hold it down and push the two together and wait. It is a thing of patience making a polyhedron. It is now started to form. Those pieces there are fine as it dries I will be able to rub it off with my finger. So if we take a model that we have already made and this is made from four isoslith triangles so it is called a tetrahedron. I can put my finger in and gently pour it apart and that will show me the net of this particular polyhedron. But before gluing it back together I will just need to remove the little pieces of old glue which pulls away with your fingers and it's now ready to be glued up again with new glue and you can always just once the glue is dried move it away and now you will be able I hope to make some of the polyhedra that we have in the two ATM pamphlets.