Transitive Property of Equality Variation 2
Collinear Then 180
Converse of the Supplementary Angles Theorem
Commutative Property Example 2
Commutative Property Variation 1
Substitution 2
Substitution 8
Substitution Example 10
Subtract Both Sides
Subtraction Example 2
Add Number to Both Sides
Transitive Property of Equality Variation 1
Angle Symmetry 4
Distance Property 2
If Bisector Then Isosceles

Proof: Distance Property 2

Let's prove the following theorem:

if distance AB = distance CD, then distance AB = distance DC

C D A B

Proof:

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Given
1 distance AB = distance CD
Proof Table
# Claim Reason
1 distance CD = distance DC distance CD = distance DC
2 distance AB = distance DC if distance AB = distance CD and distance CD = distance DC, then distance AB = distance DC
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