Media type: E-Article Title: Procedural and relational understanding of pre-service mathematics teachers regarding spatial perception of angles in pyramids Contributor: Patkin, Dorit; Plaksin, Olga Published: Informa UK Limited, 2019 Published in: International Journal of Mathematical Education in Science and Technology, 50 (2019) 1, Seite 121-140 Language: English DOI: 10.1080/0020739x.2018.1480808 ISSN: 0020-739X; 1464-5211 Keywords: Applied Mathematics ; Education ; Mathematics (miscellaneous) Origination: Footnote: