Часть 2 страница 7, ГДЗ по математике за 4 класс к рабочей тетради Дорофеева

1) Запиши названия всех четырёхугольников, которые получились на чертеже. \(\underline{\kern0.4em\vphantom{(}\textcolor{#e03131}{\boldsymbol{ABCD,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{ADEF,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{BCDE,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{ABEF,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{BCDO,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{AOEF}}\kern0.4em}\)
2) Начерти окружность с центром в точке \(O\) так, чтобы все вершины многоугольника \(ABCDEF\) оказались на этой окружности.

\[\begin{aligned} & \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small 540}\hspace{1.244em} \xrightarrow{+\,260} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{800}}}\hspace{1.244em} \xrightarrow{:\,200} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{4}}}\hspace{1.244em} \xrightarrow{\cdot\,25} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{100}}}\hspace{1.244em} \xrightarrow{+\,69} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{169}}}\hspace{1.244em} \\[0.6em] & \xrightarrow{:\,13} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{13}}}\hspace{1.244em} \xrightarrow{\cdot\,10} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{130}}}\hspace{1.244em} \xrightarrow{-\,76} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{54}}}\hspace{1.244em} \xrightarrow{\cdot\,10} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small 540}\hspace{1.244em} \end{aligned}\] \[\begin{aligned} & \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small 540}\hspace{1.244em} \xrightarrow{:\,90} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{6}}}\hspace{1.244em} \xrightarrow{+\,294} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{300}}}\hspace{1.244em} \xrightarrow{:\,15} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{20}}}\hspace{1.244em} \xrightarrow{\cdot\,19} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{380}}}\hspace{1.244em} \\[0.6em] & \xrightarrow{-\,152} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{228}}}\hspace{1.244em} \xrightarrow{:\,4} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{57}}}\hspace{1.244em} \xrightarrow{-\,3} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{54}}}\hspace{1.244em} \xrightarrow{\cdot\,10} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small 540}\hspace{1.244em} \end{aligned}\] \[\hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{300}}}\hspace{1.244em} \xrightarrow{:\,75} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{4}}}\hspace{1.244em} \xrightarrow{+\,0} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{4}}}\hspace{1.244em}\] \[\hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\small \textcolor{#e03131}{\mathbf{130}}}\hspace{1.244em} \xrightarrow{-\,111} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{19}}}\hspace{1.244em} \xrightarrow{\cdot\,3} \hspace{1.244em}\mathclap{\vcenter{\Huge\bigcirc}}\mathclap{\textcolor{#e03131}{\mathbf{57}}}\hspace{1.244em}\] \[\begin{array}{r} \vphantom{\boxed{\mathbf{0}}}\hspace{1.45em}\hspace{0.725em}\mathclap{\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{2}}\kern0.035em}}\hspace{0.725em}\hspace{0.725em}\mathclap{7}\hspace{0.725em}\hspace{1.45em} \\ \vphantom{\boxed{\mathbf{0}}}\rule[-0.55em]{0pt}{0.55em}\hspace{0.725em}\mathclap{\smash{\raisebox{0.72em}{$\times$}}}\hspace{0.725em}\hspace{1.45em}\hspace{0.725em}\mathclap{\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{3}}\kern0.035em}}\hspace{0.725em}\hspace{0.725em}\mathclap{0}\hspace{0.725em} \\ \hline \vphantom{\boxed{\mathbf{0}}}\rule{0pt}{1.2em}\hspace{1.45em}\hspace{0.725em}\mathclap{8}\hspace{0.725em}\hspace{0.725em}\mathclap{1}\hspace{0.725em}\hspace{0.725em}\mathclap{0}\hspace{0.725em} \end{array} \qquad \begin{array}{r} \vphantom{\boxed{\mathbf{0}}}\hspace{1.45em}\hspace{0.725em}\mathclap{1}\hspace{0.725em}\hspace{0.725em}\mathclap{\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{8}}\kern0.035em}}\hspace{0.725em}\hspace{1.45em} \\ \vphantom{\boxed{\mathbf{0}}}\rule[-0.55em]{0pt}{0.55em}\hspace{0.725em}\mathclap{\smash{\raisebox{0.72em}{$\times$}}}\hspace{0.725em}\hspace{1.45em}\hspace{0.725em}\mathclap{5}\hspace{0.725em}\hspace{0.725em}\mathclap{0}\hspace{0.725em} \\ \hline \vphantom{\boxed{\mathbf{0}}}\rule{0pt}{1.2em}\hspace{1.45em}\hspace{0.725em}\mathclap{9}\hspace{0.725em}\hspace{0.725em}\mathclap{0}\hspace{0.725em}\hspace{0.725em}\mathclap{\boxed{\kern0.035em\textcolor{#e03131}{\mathbf{0}}\kern0.035em}}\hspace{0.725em} \end{array}\]