Simson's line

Författare/skapare: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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Dividing a 2-digit number by a 1-digit number (2)
Variation Theory Illustration: Point-Slope Form
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Dividing a 2-digit number by a 1-digit number (1)

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Graphing Systems of Linear Equations
Golden ratio
Area regular polygon
Bird Watching
Linear derivative trace

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