right angle geoboard

Author:Laurel Langford

Points A, B, C, D and E can be dragged (moved) to make lines on the geoboards. The two blue lines are always perpendicular and the two red lines are always perpendicular (right angles).

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Angle Addition: Warm Up Exercises
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Rolling Circles and Polygons
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Fourier Lissajous (Mechanical)

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Two Congruent Triangles Make a Paralleogram
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Fractal Geometry
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