Simson's line

Autore:Terry Tam

P is a point on a circle, and ABC is an inscribed triangle. Prove that the feets of altitudes of point P on 3 sides of the triangle are collinear. (Hint: Consider PABC as a cyclic quadrilateral)

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Angle Addition Postulate (V2) - Integer Solutions
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Pythagorean Theorem: Extension Exercises
Squaring a Rectangle (PST Version)

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Lesson 8a Construction of Polygons
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