Mercator projection的副本

Author:魏向东, Zbigniew Radziszewski

Mercator projection maps the spherical (yellow) quadrangle onto irregular (blue) region on the cylinder, but preserves the area. Move the green vertices to modify the spherical quadrangle.

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Squaring a Rectangle (PST Version)
Pythagorean Theorem: Quick Illustrator
Congruent Figures
Perpendicular Lines: Quick Exploration
Congruent Sides & Angles in △s: Exploration

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Information
Longueur d'arc 2
Mug Spreadsheet 3
Triple triangle
Maclaurin Series DUD

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Division
Sequences and Series
Straight Lines
Orthocenter
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