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Screenshot of Classifying Quadrilaterals by Four Sides
Classifying Quadrilaterals by Four Sides
Screenshot of Constructing quadrilaterals
Constructing quadrilaterals
Screenshot of Drawing quadrilaterals on the grid or the pinboard
Drawing quadrilaterals on the grid or the pinboard
Screenshot of Exploring the area of a trapezium
Exploring the area of a trapezium
Screenshot of Folding paper, doing geometry figures
Folding paper, doing geometry figures
Preview of GeoGebra HowTo: Construct a Rhombus
GeoGebra HowTo: Construct a Rhombus
Screenshot of I am a parallelogram
I am a parallelogram
Screenshot of Interactive Quadrilaterals
Interactive Quadrilaterals
Preview of Investigating Quadrilaterals
Investigating Quadrilaterals
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