Предмет: Геометрия, автор: 9807654321678vbgh

ПОЖАЛУЙСТА ПОМОГИТЕ

прямокутник діагональ якого дорівнює 10 см, а одна зі сторін 2 м більша за іншу, обертається навколо більшої сторони. Знайдіть радіус і висоту отриманого циліндра.

zmeura1204: R=x; H=(x+2); теорема Піфагора: х²+(х+2)²=10²; х²+(х²+4х+4)=100; 2х²+4х+4-100=0; х²+2х-48=0 Розв'язуйте далі....

Ответы

Автор ответа: s47301156

Ответ:

10²=x²+(x+2)²

100=x²+x²+4x+4

100=2(x²+2x+2)

50=x²+2x+2

x²+2x-48

x1=6

x2= -8 не может явл-ся решением < 0

6+2 = 8

стороны равны 6 и 8 см

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