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Activity
Ministerio De Educacion Y Ciencia: Semejanza Activity
Ministry of Education and Universities of the Region of Murcia (Spain)

Ministerio De Educacion Y Ciencia: Semejanza

For Students 9th - 10th
In Spanish. In this site the concept of similar figures is introduced with interactive activities.
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Interactive
Walter Fendt: Thales' Circle Interactive
Walter Fendt

Walter Fendt: Thales' Circle

For Students 9th - 10th Standards
A short interactive activity to prove that a triangle inscribed in a semicircle is right-angled.
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