Learning Path for Triangles Sum to 180

The following is a list of all proofs that are used to prove either Triangles Sum to 180 or its ancestor proofs.

Transitive Property of Equality Variation 2
Angle Symmetry Example 2
Distance Property 2
Distance Property 1
Collinear Points Theorem
Subtract Both Sides
Add Term to Both Sides 6
Subtract Both Sides 2
Add Term to Both Sides 7
Transitive Property of Equality Variation 1
Vertical Angles
Angle Addition Theorem
Collinear Angles Property 9
Collinear Angles B
Exterior Angle is Greater
Exterior Angle B
Collinear Angles Property 10
Collinear Angles Property 3
Collinear Angles Property 3 B
Collinear Angles Property 3 C
Alternate Interior Angles Theorem
Alternate Interior Angles Theorem (Converse)
Alternate Interior Angles Theorem (Converse) 2
Commutative Property Example 2
Commutative Property Variation 1
Term 2 Substitution
Substitution 8
Angle Symmetry B
Substitution Example 10
Substitute First Term
Triangles Sum to 180
Start Path