ABCD{"color":"#202335","fontFamily":"stix","language":"ru"} – квадрат, AC{"color":"#202335","fontFamily":"stix","language":"ru"} и BD{"color":"#202335","fontFamily":"stix","language":"ru"} – диагонали, которые пересекаются в точке O,{"color":"#202335","fontFamily":"stix","language":"ru"} AC=4,{"color":"#202335","fontFamily":"stix","language":"ru"} BC{"color":"#202335","fontFamily":"stix","language":"ru"} – диагональ квадрата OBKC.{"color":"#202335","fontFamily":"stix","language":"ru"} Найти BK.{"color":"#202335","fontFamily":"stix","language":"ru"}
