Plane Geometry
Archimedes' Book of Lemmas: Proposition 1
Midpoint Theorem
Alternate Segment Theorem (Proving Part I)
Alternate Segment Theorem (Proving Part II)
Identify angles for Alternate Segment Theorem
Summary Question
What If the Tangent Becomes a Secant for Tangent-Chord Theorem?
Extension: Midpoint Theorem (Trapezium)
Extension: Midpoint Theorem (Proving Part II)
Extension: Varignon's Theorem
Information: Plane Geometry