Предмет: Геометрия, автор: plusbogdan94

Одна сторона паралелограма складає 13 см, а друга — на 8 см більша. Обчисли периметр паралелограма.


Відповідь: периметр дорівнює ................см

Ответы

Автор ответа: elenacybulina68
1

Ответ:

a=13см

b=?,на 8см больше

Р=?см

b=13+8=21см

Р=(а+b)×2

P=(13+21)×2=34×2=68см

ответ Р=68см

Автор ответа: OblivionFire
1

\sf~P=2\cdot(a+b)~;~a=13~;~b=13+8=21~\Rightarrow~P=2\cdot(13+21)=2\cdot34=68\Longrightarrow~\boxed{\tt P=68~~cm} .

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