The Point Distance to a Plane  expressions use vector algebra with a normal vector and two points on the plane. A child may perceive and experience a point distance to a plane with a ruler and optimizing to a minimum distance. Plane vector geometry abstracts the task to a multiply and add exercise. It was a wonderful rediscovery to find the mysterious term D = N dot Po is simply the nearest distance from the origin to the plane. apparel mens tshirt ($15.00) womens tshirt ($15.00) sweatshirt ($25.00) sportshirt ($25.00) size Adult-3XL Adult-2XL Adult-XL Adult-L Adult-M Adult-S Youth-XL Youth-L Youth-M Youth-S Youth-XS placement front back quote (free!)   (quote to be emailed) Scott Adams - Creativity is allowing... Sophia Kovalevskaya - It is impossible... William James - The union of... Leonardo da Vinci - Whoever despises the... Leonardo da Vinci - ...for no human... Leonardo da Vinci - Mechanics is the... Johannes Kepler - Geometria est... Johannes Kepler - Where there... 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