Concave and Convex Lenses

Autor:Ryan Smith, Tom Walsh

Move the tip of the "Object" arrow to move the object. Move the point named " Focus' " to change the focal length. Move the point named " Focus' " to the right side of the lens to change to a concave lens.

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Pathway to Proof: Triangle Angles
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Sine Transformation
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The Orthocenter of a Triangle
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The Brocard Triangle and Brocard Circle
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