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?

New Resources

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apec
Oddly Satisfying Voronoi Diagram
Here comes the sun!
Multiplying 4-Digit by 3-Digit Numbers Using an Area Model

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Will it go in? Part A
Interior Angles of A Polygon
grant eulers line
lesson Mr.V.
CS-12-13

Discover Topics

Vectors 3D (Three-Dimensional)
Trapezoid
Random Variables
Parametric Curves
Incircle or Inscribed Circle