Transitive Property of Equality Variation 2
Distance Property 6
Congruent Triangles to Angles
Angle Symmetry Example 2
Distance Property 2
Distance Property 1
Collinear Then 180
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
Exterior Angle B
Collinear Angles Property 10
Collinear Angles Property 3
Collinear Angles Property 3 B
Collinear Angles Property 3 C
alternate interior angles then parallel
Aiathenparallelshort
Congruent Triangles to Angles 2
Parallel Then Parallelogram
If Sides Congruent Then Parallelogram

Proof: Collinear Angles B

Let's prove the following theorem:

if m∠ABC = 180, then m∠CAX = m∠BAX

A C B X

Proof:

View as a tree | View dependent proofs | Try proving it

Given
1 m∠ABC = 180
Proof Table
# Claim Reason
1 m∠BAX = m∠CAX if m∠ABC = 180, then m∠BAX = m∠CAX
2 m∠CAX = m∠BAX if m∠BAX = m∠CAX, then m∠CAX = m∠BAX
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