TY - JOUR TI - Geometry of straight lines pencils AU - Janić Milan AU - Tanikić Dejan JN - Facta universitatis - series: Architecture and Civil Engineering PY - 2002 VL - 2 IS - 4 SP - 291 EP - 294 PT- Article AB- This paper considers a pencil of straight Unes in the Euclidean plane as well as the same pencil of straight lines in the projective plane where the projective geometry model M" is defined with its points forming the sets of (n-l) collinear points, whose supporting straight lines belong to the considered pencil of straight lines.