Euclid's Muse

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Profile picture of Andrew Zhao

Andrew Zhao

@redefine active 8 years, 7 months ago
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  • Profile picture of Andrew Zhao

    Andrew Zhao's profile was updated 8 years, 10 months ago

  • Profile picture of Andrew Zhao

    Andrew Zhao's profile was updated 9 years, 10 months ago

  • Profile picture of Nazmus Sadat

    Nazmus Sadat and Profile picture of Andrew ZhaoAndrew Zhao are now friends 12 years ago

  • Profile picture of Andrew Zhao

    Andrew Zhao uploaded a new app: Euclids Elements – … 12 years, 10 months ago

    Creating a tangent on a circle given point A that is outside the circle.

  • Profile picture of Andrew Zhao

    Andrew Zhao uploaded a new app: Euclids Elements – … 12 years, 10 months ago

    This proposition proves that line AD is longest, ED is shorter, FD is shorter than ED, and CD is even shorter.and that for any line there is only one other line with a point on the circle and a point at D that is equal. (Unless you drag it to somewhere it’s not supposed to be)

    I like it because it’s colorful.

  • Profile picture of Andrew Zhao

    Andrew Zhao uploaded a new app: Euclids Elements – … 12 years, 10 months ago

    Creating a parallelogram equal to a given quadrilateral with a given angle.

  • Profile picture of Andrew Zhao

    Andrew Zhao uploaded a new app: Euclids Elements – … 12 years, 10 months ago

    The very first proposition, in which Euclid creates a equilateral triangle from a straight line by using two circles.

  • Profile picture of Andrew Zhao

    Andrew Zhao uploaded a new app: Euclids Elements – … 12 years, 10 months ago

    Can you create a regular pentagon without a protractor? Because it’s pretty impressive how Euclid did it with only a compass and a ruler.

    Note that the yellow triangle is similar to the one inside the pentagon.

  • Profile picture of Andrew Zhao

    Andrew Zhao uploaded a new app: Euclids Elements – … 12 years, 10 months ago

    One of my favorite apps because it looks deceptively simple, but takes some really creative thinking.

    This app creates a square (in red) that has the same area as a given quadrilateral.

  • Profile picture of Andrew Zhao

    Andrew Zhao uploaded a new app: Euclids Elements – … 12 years, 10 months ago

    Skipping straight ahead to book 4 (shh this one is actually a first draft)

    Although GeometryExpressions allows you to create polygons with anywhere from 3 to 100 sides, Euclid gives us a way to create a regular hexagon that doesn’t need such fancy technology.

  • Profile picture of Andrew Zhao

    Andrew Zhao uploaded a new app: Euclids Elements – … 12 years, 11 months ago

    To construct, in a given rectilineal angle, a parallelogram equal to a given triangle.

    In other words, given angle D and triangle ABC (in blue), construct a parallelogram (in yellow) that has an equal area to triangle ABC.

  • Profile picture of Andrew Zhao

    Andrew Zhao uploaded a new app: Euclids Elements – … 12 years, 11 months ago

    The famous Pythagorean Theorem. Can you see how it works?

  • Profile picture of Andrew Zhao

    Andrew Zhao changed their profile picture 12 years, 11 months ago

  • Profile picture of Andrew Zhao

    Andrew Zhao uploaded a new app: Euclids Elements – … 12 years, 11 months ago

    This app shows how to create a triangle when you’re given a line composed of lines A, B, and C.

  • Profile picture of Andrew Zhao

    Andrew Zhao became a registered member 12 years, 11 months ago

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