Prospective Mathematics Teachers’ Use of the Angle Tool in GeoGebra in a Geometric Construction Task

Okumuş S., Bozkurt G.

International Journal for Technology in Mathematics Education, cilt.29, sa.2, ss.77-86, 2022 (ESCI) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 2
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1564/tme_v29.2.02
  • Dergi Adı: International Journal for Technology in Mathematics Education
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), ERIC (Education Resources Information Center)
  • Sayfa Sayıları: ss.77-86
  • Anahtar Kelimeler: prospective mathematics teachers, reflex angles, GeoGebra, geometric construction, DYNAMIC GEOMETRY, SOFTWARE
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

This case study investigates prospective middle school mathematics teachers' use of the Angle tool in GeoGebra, focusing on reflex angles in a geometric construction task. They constructed a parallelogram with individual heights for any two consecutive sides. We analyzed their screencasts to identify the ways in which they used reflex angles in GeoGebra. The results indicated that most participants concealed reflex angles in their geometric constructions. They most often showcased the ways in which reflex angles were eliminated utilizing software operations (e.g., keeping angles between 0 degrees and 180 degrees). Implications for future research are provided.