Предмет: Математика, автор: djshfiisid

Найдите площадь большого квадрата,если площадь выделенного квадрата 0,04 дм2,а площадь углового квадрата 9см2.Помогите пжжж,даю 35 баллов!!!

Приложения:

IrkaShevko: 144 см^2

Ответы

Автор ответа: kamilmatematik100504
0

Ответ:144cm²

Пошаговое объяснение:если в площадь выделенного квадрата            0,04 дм²   площадь квадрата Sв=a²=0,2  =>  a²=0,04 дм²=>a=0,2 дм=2 cm теперь найдем сторону углового квадрата Sу=b²=9 => b²=9cm²=>b=3cm теперь найдем площадь большего квадрата можно заметить что в него в ходит 4-угловых квадрата и 9-центральных квадрата а также четыре прямоугольника у которых длинна 3*2=6cm ; а ширина 3cm   тогда площадь большего квадрата равна   S=9Sв+4Sу+4*3*6=9*4+4*9+72=144cm²        

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