Stage 29 · Spatial Vectors & Solid Geometry
29.1.5 The Coplanar Vectors Theorem
29.1 From Plane Vectors into Space — Spatial Vectors and Linear Operations
Point 5 of 6
29.1.5 The Coplanar Vectors Theorem
Core ideaIf three arrows can all be laid flat on a single sheet of paper, then p=xa+yb holds and we call them coplanar.
Module goal. Carry the familiar arrow of a plane vector into three dimensions, build up addition, subtraction, scalar multiplication, and tests for collinear and coplanar vectors in space, picking up where the last stage's feel for solid shapes left off.