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Simson's line
Author:
Terry Tam
GeoGebra
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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van Aubel's Theorem
Bottema's Theorem
Slope of a Straight Line: Run and Rise
Piano. Keyboard.
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Checking the Sine Rule
Theorem 12
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Find the Equation for the Graph
Pythagoras Questions
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Integral Calculus
Confidence Interval
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