Предмет: Математика, автор: emrf

Отношение диагонали прямоугольника к его длине равно 5:3. Ширина прямоугольника 8 см. Найдите площадь.

Ответы

Автор ответа: konrad509
0

(5x)²=(3x)²+8²

25x²=9x²+64

16x²=64

x²=4

x=2

 

S=3x*8

S=3*2*8

S=48 см²

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