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9 point circle and 16 tangent circles
Author:
A.J. Perea
A, B, and C can be moved. Observe what happens to the tangent circles as you transform the triangle.
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Bottema's Theorem
Slope of a Straight Line: Run and Rise
Rotating Points (Optical Illusion)
Simplifying Radicals: Geometric Thin Slice
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Are they Congruent?
Parallelogram Lab 3
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