A computer simulation of viewing through various lengths of tubes at different distances. The simulation also has an exploration of focus questions. [Requires Java.]

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Concepts

isosceles triangles, similar triangles, triangles

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Additional Tags

looking through a tube, solving right triangles, solving triangles, illuminations, nctm, nctm illuminations, tube simulation

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Classroom Considerations

Knovation Readability Score: 3 (1 low difficulty, 5 high difficulty)

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