Cube with Triangular cone hole

grabcad

The model is of a cube, with one vertice cut off and a hole in the shape of a triangular cone made on that surface inwards. The process involved generating the cube, adding a construction plane that was used to split the body to cut the vertex off, a 3D sketch of the cone, patching surfaces from a sketch, converting it to a solid body then using the combine method to cut into the cube.