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    \Large\bf $2$�N~�O�p�`�E�l�p�`
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    \underline{\hspace{1cm}}�N\underline{\hspace{1cm}}�g\underline{\hspace{1cm}}��
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\begin{enumerate}

\item ���̕\�͐}�`�̒�`���܂Ƃ߂����̂ł��B�󗓂ɂ��Ă͂܂錾�t�������Ȃ����B

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   &                   \\[-8pt]
 ��` & $1$�g�̌����������ӂ����s�Ȏl�p�`  \\[-8pt]
   &                   \\
\hline
   &                   \\[-8pt]
 ���s�l�ӌ` &                \\[-8pt]
   &                   \\
\hline
   &                   \\[-8pt]
 �����` &                \\[-8pt]
   &                   \\
\hline
   &                   \\[-8pt]
 �Ђ��` &                \\[-8pt]
   &                   \\
\hline
   &                   \\[-8pt]
 �����` & $4$�̊p���������C$4$�̕ӂ��������l�p�`  \\[-8pt]
   &                   \\
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\item ���̐}��$\mathrm{AO}=\mathrm{BO},\mathrm{DO}=\mathrm{CO}$�Ȃ��$\mathrm{AD}/\hspace{-1mm}/\mathrm{BC}$�ł��邱�Ƃ��ؖ����Ȃ����B
�i����C���_���L�����Ȃ����j

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\item ���̐}��$\mathrm{AB}=\mathrm{CB},\mathrm{AD}=\mathrm{CD}$�Ȃ�ΐ���$\mathrm{BD}$��
$\angle \mathrm{ABC}$�̓񓙕����ł��邱�Ƃ��ؖ����Ȃ����B
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\item ���̐}�͎O�p�`�̓��p�̘a��$180^{\circ }$�ł��邱�Ƃ��ؖ����悤�Ƃ��āC
$ \triangle \mathrm{ABC}$�̓_$\mathrm{C}$��ʂ��$\mathrm{AB}$�ɕ��s�Ȓ���$\mathrm{DC}$�������C
��$\mathrm{BC}$����������$\mathrm{CE}$�Ƃ����}�ł���B

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�ؖ��j$\mathrm{AB}/\hspace{-1mm}/\mathrm{DC}$���C\fbox{~~\ajMaruKata{1}~~}~������������

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$\angle \mathrm{B}$ & $\>=\>$ & \fbox{~~\ajMaruKata{2}~~}
\end{tabular}

�܂��C\fbox{~~\ajMaruKata{3}~~}~������������

\begin{tabular}{r@{}c@{}l}
$ \angle \mathrm{A}$ & $\>=\>$ & \fbox{~~\ajMaruKata{4}~~}
\end{tabular}

���������āC

$\angle \mathrm{A}+\angle \mathrm{B} +\angle \mathrm{ACB}$

$=\fbox{~~\ajMaruKata{4}~~} +\fbox{~~\ajMaruKata{2}~~} +\angle \mathrm{ACB}$

$=180^{\circ }$

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\hline
   &               &    &               \\[-8pt]
\ajMaruKata{1} & \hspace{30mm} & \ajMaruKata{2} & \hspace{30mm} \\[-8pt]
   &               &    &               \\
\hline
   &               &    &               \\[-8pt]
\ajMaruKata{3} & \hspace{30mm} & \ajMaruKata{4} & \hspace{30mm} \\[-8pt]
   &               &    &               \\
\hline
\end{tabular}

%%���p�O�p�`
\item ���̐}��$ \angle \mathrm{A}=90^{\circ }$�ł��钼�p�񓙕ӎO�p�`$\mathrm{ABC}$�̒��_$\mathrm{A}$��
�ʂ钼����$\mathrm{B},\mathrm{C}$���琂��$\mathrm{BD},\mathrm{CE}$���������}�ł���B
���̂Ƃ�$\mathrm{BD}=\mathrm{AE}$���ؖ������B
\fbox{\mathstrut\hskip 2zw }�ɓ��Ă͂܂錾�t��L������ꂱ�̏ؖ����������Ȃ����B

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�ؖ��j$ \triangle \mathrm{ABD}$ & �� & $ \triangle \mathrm{CAE}$�ɂ����� \\

$\mathrm{AB}$ & $\>=\>$ & $\mathrm{CA}$~�i����j�c�c�c�c�c�c(1) \\

$ \angle \mathrm{ADB}$ & $=$ & $\angle \mathrm{CEA}= \fbox{~\ajMaru{1}~~} $�i����j�c(2)

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�܂��O�p�`�̓��p�̐����ɂ��

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�@�@�@$ \angle \mathrm{ABD}$ & $\>=\>$ & $180^{\circ }-\angle \mathrm{ADB} - \fbox{~~\ajMaru{2}~~}$ \\

 & $=$ & $90^{\circ }- \fbox{~~\ajMaru{2}~~}$

\end{tabular}

\vspace{-2mm}
����~$\ell$~�Ɋւ���

\begin{tabular}{r@{}c@{}l}

�@�@�@$\fbox{~~\ajMaru{3}~~}$ & $\>=\>$ & $180^{\circ }-\angle \mathrm{BAC} - \fbox{~~\ajMaru{2}~~}$ \\

 & $=$ & $90^{\circ }- \fbox{~~\ajMaru{2}~~}$ \\[2pt]

�����$ \angle \mathrm{ABD}$ & $=$ & $\fbox{~~\ajMaru{3}~~}$�c�c�c�c�c�c�c�c�c(3)

\end{tabular}

(1),(2),(3)���

\vspace{-1mm}
\begin{tabular}{r@{}c@{}l}

�@�@~~$ \triangle \mathrm{ABD}$ & $\>\equiv\>$ & $\triangle \mathrm{CAE}$~�i\fbox{~~~~~~~\ajMaru{4}~~~~~~~}�j \\

�]����~~~$\mathrm{BD}$ & $=$ & $\mathrm{AE}$~�i�Ή�����Ӂj

\end{tabular}

\begin{tabular}{|@{}c@{}|c|@{}c@{}|c|}
\hline
   &               &    &               \\[-8pt]
\ajMaru{1} & \hspace{30mm} & \ajMaru{2} & \hspace{30mm} \\[-8pt]
   &               &    &               \\
\hline
   &               &    &               \\[-8pt]
\ajMaru{3} & \hspace{30mm} & \ajMaru{4} & \hspace{30mm} \\[-8pt]
   &               &    &               \\
\hline
\end{tabular}

\end{enumerate}

\end{document}
