Again we need to imagine a translucent Earth with a light at the centre. This time, we wrap the paper in the shape of a cone which touches the Earth somewhere north (or south) of the Equator. The area that we're mapping influences where we make the tangent to the surface. We can see that the parallels of latitude are parallel, but curved and the meridians are straight, but converge towards the closest pole.
Within a reasonable distance of the tangential parallel, scale is much more consistent. Look at how Greenland and Algeria are much closer to their proper areas. The direction of north (or south) is not constant but towards some invisible 'vanishing' point. Again we cannot represent the polar regions.
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