How to Draw Orthographic Views of OBLIQUE Surfaces using XYZ Coordinate System

Point by Point and Line by Line engineering drawing example of How to Draw Orthographic Views of an object with Oblique Surfaces that starts by defining an X Y Z Coordinate System.

Oblique Surfaces are visible faces when viewed from Front View, Top View, and Right Side View - which distinguishes them from "angled, slanted, or inclined" surfaces which still look like an edge or line from 1 direction.

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TIMECODES
0:00 What is an Oblique Surface?
0:54 Engineering Drawing Coordinate System
3:05 How to draw Oblique Surfaces
4:40 Draw Front View, Top View, Right Side View

[darealspongebob]

Wait how did you find the height of the isometric drawing?? From every view it looks like the height changes..