\[\boxed{\mathbf{1.}ОК\ ГДЗ\ –\ домашка\ на\ 5}\]
\[\textbf{а)}\ PE \subset ABD\]
\[MK \subset BCD\]
\[DB \subset ABD;DB \subset BCD\]
\[AB \subset ABD;AB \subset ABC\]
\[EC \subset ABC\]
\[\textbf{б)}\ C = DK \cap ABC;\]
\[E = CE \cap ABD.\]
\[\textbf{в)}\ A;B;D;E;M;P \in ABD\]
\[B;C;D;M;K \in BCD\]
\[B;D;M \in BD = ABD \cap BCD\]
\[\textbf{г)}\ BC = ABC \cap DCB\]
\[AD = ABD \cap CDA\]
\[CE = PDC \cap ABC\]