Two Perpendicular Theorem Proof: If two coplanar lines a and b are each perpendicular to the same line, then they are parallel to each other.
Given: a c, b c
|1) a c, b c||1) Given|
|2) 1 and 2 are 90 degree angles.||2) Definition of perpendicular lines|
|3) m1 = m2||3) Transitive Property|
|4) a b||4) Corresponding Angles Postulate|
- Jaime III
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