Lecture

Theorem of Three Perpendiculars, Shadow of a Point

Description

This lecture covers the Theorem of Three Perpendiculars, explaining how a line is perpendicular to a plane if it is perpendicular to two lines on the plane. It also discusses the shadow cast by a point on different planes, detailing the intersection of the light ray with the planes. The lecture provides demonstrations and examples to illustrate these concepts.

Official source

https://mediaspace.epfl.ch/media/0_q0huisls

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Ontological neighbourhood

Mathematics

Geometry: Euclidean geometry

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