{"type":"rich","version":"1.0","title":"Поворот параллелограмма на 30 гр. по и против ч.с.","html":"<iframe src=\"https://www.desmos.com/calculator/yc3bdei779?embed\" width=\"500px\" height=\"500px\" style=\"border: 1px solid #ccc\" frameborder=0></iframe>","width":500,"height":500}