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auxiliary plane will in the same manner give a second point on the required line. The line passing
through these two points is required line of intersection.
In Figure 4.23 auxiliary plane is parallel to the horizontal plane of projections.

Figure 4.23

All traces intersect on axis x
In this case both the horizontal and frontal piercing points of the line of intersection are at the
intersection of the traces with x hence both projections of the line of intersection pass through this
point (Fig 4.24).

Figure 4.24

Two traces of planes are parallel
In this case the line of intersection is parallel to the pair of parallel traces, hence respective
projection of the line of intersection is parallel to their (Fig 4.25).

Г2
Ф2

N2 h2

Фx Гx N1
x12

Ф1 Г1 h1

Figure 4.25

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