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Those are the reasons when I put BD perpendicular to AC

Those are the reasons when I put BD perpendicular to AC-example-1

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Explanation:

Actually, ∠BDA+∠BDC=180°

2∠BDA= 180°(CPCTC)

∠BDA= 90°

This is how BD is perpendicular to AC

User Pablouche
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