Предмет: Геометрия, автор: Tywenko

знайди середню лінію трапеції, якщо її основи відносяться 4:5, а різниця основ 20 см

А)90 см
Б)45 см
В)180 см
Г)100 см

Ответы

Автор ответа: Пеппер
0

Ответ:

90 см

Объяснение:

Нехай основи трапеції 4х см і 5х см, тоді за умовою

5х-4х=20

х=20

4*20=80 см менша основа

5*20=100 см більша основа

(80+100):2=90 см

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