February 2022 1 16 Report
Найдите площадь треугольника ABC с вершинами: а) A(7; 2), B(2; 7), C(-3; -3); б) А(-2; 4), B(4; 9), C(5; -6); в) А(9; 6), B(1; 9), C(4; -8) г) A(3; -1), B(-2; -7), C(-7; 12); д) A(-4; 3), B(6; -9), C(7; 2)
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