Найти периметр сечения.
KM=KN=NM
Рассмотрим KB1M :
1)KB1=B1M=a/2
Найдем KM:
KM^2=KB1^2+B1M^2
KM^2=a^2/2
KM=a/√2=√2*a/2
P(kmn)=KM+KN+NM=3*(√2*a/2)=1,5√2*a
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Verified answer
KM=KN=NM
Рассмотрим KB1M :
1)KB1=B1M=a/2
Найдем KM:
KM^2=KB1^2+B1M^2
KM^2=a^2/2
KM=a/√2=√2*a/2
P(kmn)=KM+KN+NM=3*(√2*a/2)=1,5√2*a