Проверка знаний о вычислении площади фигур

object(ArrayObject)#853 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(92) "Решение задач на вычисление площадей фигур.8 класс"
    ["seo_title"] => string(63) "rieshieniie-zadach-na-vychislieniie-ploshchadiei-fighur-8-klass"
    ["file_id"] => string(6) "293522"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1455478300"
  }
}

object(ArrayObject)#875 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(48) "Вычисление площадей фигур"
    ["seo_title"] => string(33) "vychislieniie_ploshchadiei_fighur"
    ["file_id"] => string(6) "383970"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1485411525"
  }
}

object(ArrayObject)#853 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(45) "Площадь прямоугольника. "
    ["seo_title"] => string(28) "ploshchad-priamoughol-nika-3"
    ["file_id"] => string(6) "166347"
    ["category_seo"] => string(16) "nachalniyeKlassi"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1422953158"
  }
}

object(ArrayObject)#875 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(118) "Конспект урока по математике на тему: «Площадь прямоугольника». "
    ["seo_title"] => string(67) "konspiekt-uroka-po-matiematikie-na-tiemu-ploshchad-priamoughol-nika"
    ["file_id"] => string(6) "104858"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1402764065"
  }
}

object(ArrayObject)#853 (1) {
  ["storage":"ArrayObject":private] => array(6) {
    ["title"] => string(42) "Вычисление интегралов "
    ["seo_title"] => string(26) "vychislieniie-intieghralov"
    ["file_id"] => string(6) "130863"
    ["category_seo"] => string(10) "matematika"
    ["subcategory_seo"] => string(5) "uroki"
    ["date"] => string(10) "1415998799"
  }
}