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Corollary: Sum of Two Supplemental Angles Equals Two Right Angles

(related to Proposition: 1.13: Angles at Intersections of Straight Lines)

The sum of two supplemental angles equals two right angles.

Table of Contents

Proofs: 1

Mentioned in:

Proofs: 1

Thank you to the contributors under CC BY-SA 4.0!

Github:
bookofproofs
non-Github:
@Calahan
@Casey

References

Adapted from CC BY-SA 3.0 Sources:

  1. Callahan, Daniel: "Euclid’s 'Elements' Redux" 2014

Adapted from (Public Domain)

  1. Casey, John: "The First Six Books of the Elements of Euclid"