Euclid's Fifth

Euclid's Fifth Postulate

Adjust the sliders to change the size of alternate angles n and m. Can you find the relationship between n and m to decide which side of XY the lines AB and CD cross?

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Rolling an Equilateral Triangle
Building Triangles with Set Areas
Building Trapezoids with Set Areas
Building Parallelograms with Set Areas
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Start, Bisect an angle
Eksplorasi Persegi
BH flag
DEMO Understand squareroot formula

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Dilatazione
Punti speciali
Numeri complessi
Coordinate
Funzioni potenza