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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §11.2 Planes and Projections, #44 · Multivariable Calculus · Vectors & geometry

From their equations, how can you tell if two planes are (a)…

From their equations, how can you tell if two planes are
(a) parallel (b) perpendicular (c) at a angle?

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §11.2 Planes and Projections, #44

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