Transitive Property of Equality Variation 2
Right Angle Reverse
Cosine
Cosine 2
Transitive Property of Equality Variation 1
Divide Both Sides
Divide Both
Divide Distances
Cosine 3

Proof: Divide Both

Let's prove the following theorem:

if the following are true:
  • a / b = c / d
  • d = e

then a / b = c / e

Proof:

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Given
1 a / b = c / d
2 d = e
Proof Table
# Claim Reason
1 c / d = c / e if d = e, then c / d = c / e
2 a / b = c / e if a / b = c / d and c / d = c / e, then a / b = c / e
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