• If both projections of the point fall on the plane of the frontal projection, then the point is in the fourth quarter
• If both projections of the point fall on the plane of horizontal projection, then the point is in the second quarter
• If the horizontal projection of the point falls on the plane of the frontal projection and the frontal projection falls on the plane of the horizontal projection, then the point is in the third quarter
• If the projections of the point are projected in the usual way, the point is in the first quarter
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