Proof: Right Triangle Property
Let's prove the following theorem:
if △ABC is a right triangle, then m∠ABC = 90
Proof:
Given
1 | △ABC is a right triangle |
---|
# | Claim | Reason |
---|---|---|
1 | ∠ABC is a right angle | if △ABC is a right triangle, then ∠ABC is a right angle |
2 | m∠ABC = 90 | if ∠ABC is a right angle, then m∠ABC = 90 |
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