Предмет: Математика, автор: azhasankyzy

995. Периметр квадрата 22,48 дм. Найдите его площадь. Отве округлите до десятых.
Нужно только УСЛОВИЕ

Ответы

Автор ответа: prettypushkova

6

Р = 22,48 дм - периметр квадрата

а - ?

S = a² - ?

- - - - - - - - - - - - - - - - - - - - - - - - - - - -

Р = 4а = 22,48 дм - периметр квадрата

а = 22,48 : 4 = 5,62 дм - длина стороны квадрата

S = a² = (5,62)² = 5,62 · 5,62 = 31,5844 дм² ≈ 31,6 дм²- площадь квадрата.

Ответ: 31,6 дм².

Автор ответа: danya111839

3

Ответ:

P=22,48 дм

S=?

Пошаговое объяснение:

a=22,48÷4=5,62

S=5,62×5,62=31,5844≈31,6дм²

prettypushkova: Округлено неверно. Если за округляемым разрядом (0,5) стоит цифра 5 или больше (у нас 0,58), а 8 > 5, то к округляемому разряду добавляется единица. Правильный ответ: 31,6 дм (в квадрате).

prettypushkova: Надо бы исправить, добавить ответ и единицы измерения (иначе ответ подлежит удалению).

danya111839: ошибся, извиняюсь. спасибо, что поправили

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