MATSEC AM Pure Mathematics Complete Prep Course — Lesson 34: Perpendicular distance from a point to a line

Sarah Mitchell teaches the perpendicular distance formula for MATSEC Advanced Matriculation Pure Mathematics: the modulus of a x-one plus b y-one plus c over the square root of a squared plus b squared. She stresses rewriting the line in general form first, reading the unsigned value to decide which side a point lies on, the origin and parallel-line shortcuts, finding the foot of the perpendicular, and comparing the distance from a circle's centre with its radius. Two worked problems close the lesson.

Lesson 34 of 158 in the MATSEC AM Pure Mathematics Complete Prep Course audio course from ExamPrepRise.

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