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Jay Warendorff
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Demonstrations 221  240 of 271
Hjelmslev's Theorem
Menelaus' Theorem
Viviani's Theorem
The ThreeChord Lemma
A Product of Chord Lengths in a Circle
The Chordal Theorem
Secant Intersection with Two Internally Tangent Circles
How the Altitude Divides the Hypotenuse
Dividing a Right Triangle by the Altitude to the Hypotenuse
The Area of a Triangle as Half a Rectangle
Inscribed Angles That Intercept the Same Arc
Tangent Circles
Division of the Opposite Side by an Angle Bisector
The Eyeball Theorem
Equally Distant Chords
Side Lengths Opposite Unequal Angles
Tangents to a Circle
Tangent Chord Angle
Triangles: Scalene, Isosceles, and Equilateral
Triangles: Acute, Right, and Obtuse
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