A 3 dimensional figure as a square base and 4 lateral faces that meet at point explain the difference between the cross section when a slice is made perpendicular to the base thought the vertex and when a slice is made perpendicular to the base not thought the vertex

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .