Triangles

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INTEF

This first look at triangles during the first two years of secondary education is mainly focused on the following: constructing triangles using a ruler and compass, characteristics of equal triangles, angles and area. Before studying this unit students should be familiar with how to measure angles and carry out operations with them. Although the study of special lines in a triangle usually takes place during the third and fourth years of secondary education a general introduction to this area in the second year is useful, and the Nippe Descartes programme is an excellent way of doing this.

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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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publisher INTEF 06/12/2025 publisher INTEF . 06/12/2025 publisher INTEF 06/12/2025 author Miguel García Reyes 06/12/2025 publisher Instituto de Tecnologías Educativas (ITE) 06/12/2025 editor Instituto de Tecnologías Educativas (ITE) 06/12/2025 technical validator José María Aína Martínez 06/12/2025