Задание 
Определи угол между векторами, расположенными в кубе.
\(\widehat{\left(\overrightarrow{A_1D_1} \,\overrightarrow{BC}\right)}=\) [ ]\(\degree\);
\(\(\widehat{\left(\overrightarrow{AC} \, \overrightarrow{C_1A_1}\right)}\)=) [ ]\(\degree\);
\(\widehat{\left( {\overrightarrow{AC}} {\overrightarrow{BC}} \right)} =\) [ ]\(\degree\);
\(\widehat{\left(\overrightarrow{BB_1} \,\overrightarrow{C_1B}\right)}=\) [ ]\(\degree\).