What is the difference between isometric drawing and isometric projection?
In an isometric projection, the plane is placed in such a way that all the, three visible sides of the object make same angle with one another. After drawing a horizontal line, draw two lines at 45° and 30° angle with it. Put marks on the 45° line according to the actual scale. Now draw perpendicular offsets from 45° line up to 30° line which will represent the isometric scale. All the dimensions in the isometric drawing are actual while in the Isometric projection, the isometric scale is to be used.