iGeom

Lesson 3: classical problems of minimal distance through isometries.

Exercise ::Given the points A, B, C, D and E and the lines r and s, construct the point P in r and point Q in s such that PQ perpendicular at r and d(A,P)+d(P,Q)+d(Q,B) is minimal.
Sugestion: use the interactive calculator to determine the minimal point, then search for some constructible property.

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