Proof: Angle to Self
Let's prove the following theorem:
if m∠BDA = 180 and m∠CEA = 180, then m∠BAE = m∠CAD
Proof:
Proof Table
# | Claim | Reason |
---|---|---|
1 | m∠DAE = m∠BAE | if m∠BDA = 180, then m∠DAE = m∠BAE |
2 | m∠EAD = m∠CAD | if m∠CEA = 180, then m∠EAD = m∠CAD |
3 | m∠DAE = m∠EAD | m∠DAE = m∠EAD |
4 | m∠EAD = m∠BAE | if m∠DAE = m∠EAD and m∠DAE = m∠BAE, then m∠EAD = m∠BAE |
5 | m∠BAE = m∠CAD | if m∠EAD = m∠BAE and m∠EAD = m∠CAD, then m∠BAE = m∠CAD |
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