Proof: Equal Angles 2
Let's prove the following theorem:
if m∠BXD = 180 and m∠ADX = m∠CDX, then m∠ADB = m∠CDB
Proof:
Proof Table
| # | Claim | Reason |
|---|---|---|
| 1 | m∠ADX = m∠ADB | if m∠BXD = 180, then m∠ADX = m∠ADB |
| 2 | m∠ADB = m∠CDX | if m∠ADX = m∠ADB and m∠ADX = m∠CDX, then m∠ADB = m∠CDX |
| 3 | m∠CDX = m∠CDB | if m∠BXD = 180, then m∠CDX = m∠CDB |
| 4 | m∠ADB = m∠CDB | if m∠ADB = m∠CDX and m∠CDX = m∠CDB, then m∠ADB = m∠CDB |
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