Stage 29 · Spatial Vectors & Solid Geometry
29.5.1 The Projection of a Vector
29.5 Computing Distances with Vectors — Point-to-Plane and Full Modeling
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29.5.1 The Projection of a Vector
Core ideaCast one arrow's shadow onto another, and the length of that shadow is the projection of a in the direction of b.
Module goal. Use the idea of projection to find the distance from a point to a plane, pull together the full routine of setting up axes, assigning coordinates, and finding vectors, and pave the way for the next stage where analytic geometry makes geometry fully algebraic.