Предмет: Геометрия, автор: Maks1480

Срочно надо решить даю 30 баллов

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Автор ответа: orjabinina

1

Объяснение:

Длина отрезка KN=KM+MN, но MN=MK=a , значит

KN=a+a=2a

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