Предмет: Геометрия, автор: davidos68

Дано: ∆АВС.
КР- середня линея. кут С=90°. 
Р ∆АВС= 60см
ВС-АС=7 см
ВА-ВС= 1 см
Знайти КР

Ответы

Автор ответа: DaniSteff
1
пусть КР =х, тогда СВ=2х, СА=2х-7, АВ=2х+1.
Р=АВ+ВС+СА
60=2х+1+2х+2х-7
60=6х-6
6х=66
х=11
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