ME = 1/2MK, MF = 1/2ML по условию, значит EF - средняя линия ΔKLM и по свойсту средней линии EF = 1/2KL.
Pmef = ME + MF + EF = 31
1/2MK + 1/2ML + 1/2KL = 31
1/2(MK + ML + KL) = 31
MK + ML + KL = 62
Pklm = 62
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ME = 1/2MK, MF = 1/2ML по условию, значит EF - средняя линия ΔKLM и по свойсту средней линии EF = 1/2KL.
Pmef = ME + MF + EF = 31
1/2MK + 1/2ML + 1/2KL = 31
1/2(MK + ML + KL) = 31
MK + ML + KL = 62
Pklm = 62