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G.GCO.9 Exploring Isosceles Triangles (VB)

STUDENTS:

Use the limited toolbar in the GeoGebra window below to construct a triangle that ALWAYS REMAINS ISOSCELES! (Be sure it passes the DRAG TEST!)

QUESTION:

Use the ANGLE tool to measure this triangle's interior angles. Move the vertices around. What do you notice? Explain as best as you can.