Simson's Theorem
Let ABC be a triangle. Let P be a point on the circumcircle and let A', B', and C' be the feet of the perpendiculars from P to BC, AC, and AB. Then A', B' and C' are collinear.
Contributed by:
Jay Warendorff
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Circumcircle
(
Wolfram
MathWorld
)
Collinear
(
Wolfram
MathWorld
)
Simson Line
(
Wolfram
MathWorld
)
"
Simson's Theorem
" from
The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/SimsonsTheorem/
Contributed by:
Jay Warendorff
Plane Geometry
Triangles
Viviani's Theorem
Stengel's Theorem
The Pivot Theorem
Euler's Theorem for Pedal Triangles
Napoleon's Theorem
Cross's Theorem
Menelaus' Theorem
Ceva's Theorem
Routh's Theorem
Stewart's Theorem
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