Let u = {plane quadrilateral} a = {parallelogram} then is CUA = CUA equal to {plane quadrilateral parallelogram}?

Let u = {plane quadrilateral} a = {parallelogram} then is CUA = CUA equal to {plane quadrilateral parallelogram}?


CUA = planar quadrilateral



The problem of oblique drawing in mathematics compulsory 2
Any triangle: how to draw a visual picture of a triangle with three unequal sides
Can't you draw?


The coordinate system is established by an edge and the line with the height of the edge