Drawing this angle

At 270 degrees, compare the opposite profile with the first side view. Start by tracing the forehead-to-chin contour in the air, then draw it as connected changes of direction. Measure the nose tip and lips against the chin rather than placing each feature independently. Leave room for the cranial mass behind the ear; the visible face occupies only part of the head's total depth.

Check the slope from the chin back to the jaw corner and the way the neck joins beneath it. Place the ear using its relationship to the brow and base of the nose as observed here. The tonal plate may describe this side differently from 90 degrees, so do not simply reverse the earlier shading. Try two studies: a flat silhouette for the proportions, followed by a line block-in with the ear and jaw. Add the eye last, checking its short visible width and its depth behind the brow.