December 2021 0 85 Report
В произвольном пятиугольнике АВСDЕ точки: К - середина АВ, L- середина ВС, М - середина СD, N- середина DЕ.
Точки: Р - середина КМ, Q - середина LN.
Доказать: а) PQ||АЕ; б) PQ=1/4 AE
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