I tried the commands: CONVTOSOLID SURFSCULPT to fill the half circle surface. but it is not working. how can i make that a solid? and after making it
the teacher first drew a big circle on the blackboard, and the children copied it (17) sheets of paper. the teacher drew a smaller circle over the first one and then put two triangles(三角形) at each side. the children drew (18) the same way. the lesson continued until there were ...