Proof: Divide 180 by 2 2

Let's prove the following theorem:

if a ⋅ 2 = 180, then a = 90

Proof:

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Given
1 a ⋅ 2 = 180
Proof Table
# Claim Reason
1 a = 180 / 2 if a ⋅ 2 = 180, then a = 180 / 2
2 180 / 2 = 90 180 / 2 = 90
3 a = 90 if a = 180 / 2 and 180 / 2 = 90, then a = 90

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