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Identifying rays

Identifying Rays

Khan Academy
Introduction to Euclidean geometry
502
05:39

The golden ratio

An introduction to one of the most amazing ideas/numbers in mathematics

Khan Academy
Introduction to Euclidean geometry
461
14:41

Language and notation of the circle

Formal definition of a circle. Tangent and secant lines. Diameters and radii. major and minor arcs

Khan Academy
Introduction to Euclidean geometry
510
11:11

Specifying planes in three dimensions

Khan Academy
Introduction to Euclidean geometry
452
04:11

Drawing lines exercise example

Khan Academy
Introduction to Euclidean geometry
512
01:54

Lines, line segments, and rays

Difference between lines, line segments, and rays

Khan Academy
Introduction to Euclidean geometry
449
03:37

Euclid as the father of geometry

Euclid and his Elements (and how much Abraham Lincoln liked them)

Khan Academy
Introduction to Euclidean geometry
550
08:22