Координаты на плоскости

object(ArrayObject)#851 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(45) "Координатная плоскость. "
    ["seo_title"] => string(24) "koordinatnaia-ploskost-1"
    ["file_id"] => string(6) "104908"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1402769025"
  }
}

object(ArrayObject)#873 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(88) "Открытый урок по  теме: "Координатная плоскость" "
    ["seo_title"] => string(46) "otkrytyi-urok-po-tiemie-koordinatnaia-ploskost"
    ["file_id"] => string(6) "195867"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1427974282"
  }
}

object(ArrayObject)#851 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(62) "Путешествие по системе координат "
    ["seo_title"] => string(38) "putieshiestviie-po-sistiemie-koordinat"
    ["file_id"] => string(6) "155918"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1421338443"
  }
}

object(ArrayObject)#873 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(125) "Учебный проект по математике  "Координаты и координатная плоскость" "
    ["seo_title"] => string(69) "uchiebnyi-proiekt-po-matiematikie-koordinaty-i-koordinatnaia-ploskost"
    ["file_id"] => string(6) "124008"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1414609327"
  }
}

object(ArrayObject)#851 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(81) "Тема Прямоугольные координаты на плоскости "
    ["seo_title"] => string(46) "tiema-priamoughol-nyie-koordinaty-na-ploskosti"
    ["file_id"] => string(6) "240374"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1445005449"
  }
}