Euclid's Fifth

Euclid's Fifth Postulate

Adjust the sliders to change the size of alternate angles n and m. Can you find the relationship between n and m to decide which side of XY the lines AB and CD cross?

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Linear Systems + Relationships Between Coefficients and Solutions

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Cool calculator.
Dodecahedron Half 2 Pyramid
รูปคลี่พีระมิด
Series and Parallel Reliability
Inverse Pythagorean Theorem

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Random Variables
Frequency Distribution
Reflection
Root
Piecewise Functions