Предмет: Геометрия, автор: Gggjenxe

LMKN-піраміда
MN-8см
LK-12см
Знайдіть:PABCD

Приложения:

Ответы

Автор ответа: zmeura1204

1

Ответ:

Периметр паралелограма АВCD дорівнює 20см

Объяснение:

AD- середня лінія трикутника ∆MKN

AD=½*MN=½*8=4см

ВС- середня лінія трикутника ∆LMN

BC=½*AD=½*8=4см

АВ- середня лінія трикутника ∆МКL

AB=½*LK=½*12=6см

CD- середня лінія трикутника ∆NKL

CD=½*LK=½*12=6см

Р(ABCD)=2(AB+BC)=2(4+6)=

=2*10=20см

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