Предмет: Геометрия, автор: Eljt

Одна сторона паралелограма становить 9 см, а периметр - 56 см. Обчислить довжину сусідньої сторони СРОЧНОООО

Ответы

Автор ответа: Guppy2016
0

в параллелограмме противоположные стороны равны между собой ВС=AD,ВА =CD=9см .

периметр параллелограмма это удвоенная сумма длины и ширины ->пол периметра это сумма длины и ширины-> если разделить периметр на 2 и вычесть известную сторону ,то можно найти смежную с ней сторону.

56:2 -9=28-9=19(см )-ВС=AD

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