Часть 1 страница 21, ГДЗ по математике за 4 класс к рабочей тетради Дорофеева

Луч \({\underline{\kern0.4em\textcolor{#e03131}{\boldsymbol{LP}}\kern0.4em}}\) \({\qquad}\) Отрезок \({\underline{\kern0.4em\textcolor{#e03131}{\boldsymbol{NM}}\kern0.4em}}\) \({\qquad}\) Прямая \({\underline{\kern0.4em\textcolor{#e03131}{\boldsymbol{EK}}\kern0.4em}}\)
Квадрат \({\underline{\kern0.4em\textcolor{#e03131}{\boldsymbol{ABCD}}\kern0.4em}}\) \({\qquad}\) Треугольник \({\underline{\kern0.4em\textcolor{#e03131}{\boldsymbol{FTR}}\kern0.4em}}\)
Как называется фигура, которая осталась? Запиши двумя способами.
\(\underline{\kern0.4em\vphantom{(}\textcolor{#e03131}{\boldsymbol{\textbf{Прямоугольник }SGOV\kern-0.2em,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{\textbf{четырёхугольник }SGOV}}\kern0.4em}\)
2) Проведи диагонали в квадрате. Обозначь буквой \(H\) точку их пересечения. Запиши обозначения треугольников, которые получились на чертеже.

\(\underline{\kern0.4em\vphantom{(}\textcolor{#e03131}{\boldsymbol{ABH,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{BCH,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{CDH,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{DAH,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{ABC,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{BCD,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{CDA,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\boldsymbol{DAB}}\kern0.4em}\)

\[\begin{aligned} 780 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{+}}}}\hspace{0.72em}} 120 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{:}}}}\hspace{0.72em}} 6 &= 800 & \qquad (780 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{+}}}}\hspace{0.72em}} 120) \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{:}}}}\hspace{0.72em}} 6 &= 150 \\ 780 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{-}}}}\hspace{0.72em}} 120 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{\cdot}}}}\hspace{0.72em}} 6 &= 60 & \qquad (780 \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{-}}}}\hspace{0.72em}} 120) \mathbin{\hspace{0.72em}\mathclap{\vcenter{\Large\bigcirc}}\mathclap{\textcolor{#e03131}{\pmb{\boldsymbol{:}}}}\hspace{0.72em}} 6 &= 110 \end{aligned}\]

\(\underline{\kern0.4em\vphantom{(}\textcolor{#e03131}{\mathbf{256,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\mathbf{265,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\mathbf{345,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\mathbf{354,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\mathbf{435,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\mathbf{453,}}\kern0.4em}\)
\(\underline{\kern0.4em\vphantom{(}\textcolor{#e03131}{\mathbf{526,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\mathbf{534,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\mathbf{543,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\mathbf{562,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\mathbf{625,}\ }}\allowbreak \underline{\vphantom{(}\textcolor{#e03131}{\mathbf{652}}\kern0.4em}\)
Всего \({\rule{0pt}{1.23em}\boxed{\smash[b]{\underset{\hspace{1.5em}}{\textcolor{#e03131}{\mathbf{12}}}}}}\) чисел.