@article{oai:u-gakugei.repo.nii.ac.jp:00050228,
 author = {佐藤,亮太},
 issue = {33},
 journal = {学芸大数学教育研究},
 month = {Jun},
 note = {application/pdf, 論文(Article), http://ci.nii.ac.jp/books/openurl/query?url_ver=z39.88-2004&crx_ver=z39.88-2004&rft_id=info%3Ancid%2FAN10114706},
 pages = {13--23},
 title = {拡張に焦点を当てた三角比の単元計画},
 year = {2021}
}