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Foundations of Euclidean Geometry
Classical Foundations of Euclidean Geometry
From Euclid to Hilbert
Trickier Parts of Hilbert
Hilbert's Approach to Congruence
Hilbert's Foundations: Proving the Vertical Angle Theorem
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Here's how to prove the vertical angle theorem. Suppose we have vertical angles. Let's call ∠BAE=x\angle BAE = x∠BAE=x and ∠DAC=y\angle DAC = y∠DAC=y. Due to the definition of s…
By Abigale Kim (a+bi), Ahaan Rungta
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