How to Think Geometrically

Lecture Number	Part I	Part II	Part III
1	Pictorial Reasoning I	Proofs and Euclid I	Conics and Coordinates I
2	Pictorial Reasoning II	Proofs and Euclid II	Conics and Coordinates II
3	Lines and Angles I	Triangle Geometry I	Conics and Coordinates III
4	Lines and Angles II	Triangle Geometry II	Conics and Coordinates IV
5	Congruence I	Triangle Geometry III	Conics and Coordinates V
6	Congruence II	Similarity I	Conics and Coordinates VI
7	Circles and Angles I	Similarity II	Trigonometric Functions I
8	Circles and Angles II	Similarity III	Trigonometric Functions II
9	Triangle Inequality I	Trigonometry I	Trigonometric Functions III
10	Triangle Inequality II	Trigonometry II	Vectors and 3D Geometry I
11	Pythagoras Theorem	Trigonometry III	Vectors and 3D Geometry II
12	Areas and Volumes I	Area and Ratios I	Vectors and 3D Geometry III
13	Areas and Volumes II	Area and Ratios II	Geometry of Complex Numbers I
14	Areas and Volumes III	Area and Ratios III	Geometry of Complex Numbers II
15	Polygons I	Power of Point I	Beyond Euclid I
16	Polygons II	Power of Point II	Beyond Euclid II

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