Proof: Angle 90 Then Perpendicular
Let's prove the following theorem:
if m∠ABC = 90, then AB ⊥ BC
Proof:
Given
1 | m∠ABC = 90 |
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# | Claim | Reason |
---|---|---|
1 | ∠ABC is a right angle | if m∠ABC = 90, then ∠ABC is a right angle |
2 | AB ⊥ BC | if ∠ABC is a right angle, then AB ⊥ BC |
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