L4M

Plane Geometry 14: Property 1 of Isosceles Triangle, T5: Base angles in isosceles triangle are equal
Plane Geometry 14: Property 1 of Isosceles Triangle, T5: Base angles in isosceles triangle are equal
Plane Geometry 13: Definition of Isosceles Triangle and Equilateral Triangle
Plane Geometry 13: Definition of Isosceles Triangle and Equilateral Triangle
Plane Geometry 12-3: Intersection Point of the Heights of an Obtuse Triangle
Plane Geometry 12-3: Intersection Point of the Heights of an Obtuse Triangle
Plane Geometry 12-2: Intersection Point of the Heights of an Acute Triangle and of a Right Triangle
Plane Geometry 12-2: Intersection Point of the Heights of an Acute Triangle and of a Right Triangle
Plane Geometry 12-1: Height of a Triangle, All Three Heights of a Triangle Intersect at One Point
Plane Geometry 12-1: Height of a Triangle, All Three Heights of a Triangle Intersect at One Point
Plane Geometry 11: Angle Bisector of an Angle, Angle Bisectors of a Triangle
Plane Geometry 11: Angle Bisector of an Angle, Angle Bisectors of a Triangle
Plane Geometry 10 - Definitions of Midpoint of a Line Segment and Medians of a Triangle
Plane Geometry 10 - Definitions of Midpoint of a Line Segment and Medians of a Triangle
Plane Geometry 9-2: Theorem 4-Part 2: Perpendicular from a point to a line is unique.
Plane Geometry 9-2: Theorem 4-Part 2: Perpendicular from a point to a line is unique.
Plane Geometry 9-1: T4-From any point, not on a given line, it's possible to draw a perpendicular.
Plane Geometry 9-1: T4-From any point, not on a given line, it's possible to draw a perpendicular.
Plane Geometry 8: First Sign of Congruent Triangles (SAS)
Plane Geometry 8: First Sign of Congruent Triangles (SAS)
Plane Geometry 7: Triangles, Congruent Triangles
Plane Geometry 7: Triangles, Congruent Triangles
Plane Geometry 6-4: Proof by Contradiction
Plane Geometry 6-4: Proof by Contradiction
Plane Geometry 6-3: Another Real Life Example of Conditional Clause, Negation of Conditional Clause
Plane Geometry 6-3: Another Real Life Example of Conditional Clause, Negation of Conditional Clause
Plane Geometry 6-2: Conditional Clauses, A Real Life Example, Truth Values of a Conditional Clause
Plane Geometry 6-2: Conditional Clauses, A Real Life Example, Truth Values of a Conditional Clause
Plane Geometry 6-1: Proposition, Truth Value of a Proposition, Negation of a Proposition
Plane Geometry 6-1: Proposition, Truth Value of a Proposition, Negation of a Proposition
Plane Geometry 5: Perp. Lines, T2: Two lines, perpendicular to a third line, do not intersect.
Plane Geometry 5: Perp. Lines, T2: Two lines, perpendicular to a third line, do not intersect.
Plane Geometry 4: Adjacent, Complementary, Supplement.., Vertical Angles, T1-Vertic. angles are eq.
Plane Geometry 4: Adjacent, Complementary, Supplement.., Vertical Angles, T1-Vertic. angles are eq.
Plane Geometry 3: Straight Angle, Degree, Right Angle, Acute Angle, Zero-Degree Angle, Obtuse Angle
Plane Geometry 3: Straight Angle, Degree, Right Angle, Acute Angle, Zero-Degree Angle, Obtuse Angle
Plane Geometry 2: Definitions of Line Segment, Ray, and Angle
Plane Geometry 2: Definitions of Line Segment, Ray, and Angle
Plane Geometry 1: Axiom 1:
Plane Geometry 1: Axiom 1: "Through any two points in plane passes a unique line", 2 Lines in Plane