Предмет: Геометрия, автор: vikapolatajko

Площа бічної поверхні правильної трикутної піраміди дорівнює 255 см2, а її апофема дорівнює 10см. Знайдіть сторону основи цієї піраміди.​

Ответы

Автор ответа: makszalinsky
0

Ответ:

а=12,75 см

Объяснение:

Sbok.pov- 1/2* Posn* ha

ha= 10 см

Sbok= 255 см²

Pосн=4а, а - сторона основи правильної піраміди

1/2*4а*10=255 а=12,75

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