TY - JOUR AU - V. K. Gavrilov TI - Proportional segments, a polygon, and Chevy's lines into a circle of the 7-th year students' research competence JO - Matematičeskoe obrazovanie PY - 2019 SP - 2 EP - 8 VL - 89 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MO_2019_89_1_a0/ LA - ru ID - MO_2019_89_1_a0 ER -