1 Perpendicular lines form congruent, adjacent angles.
2. Two angles that are supplementary and congruent are right angles.
2006-10-28 04:49:12 · 2 answers · asked by 2 days after my B day :) 2 in Science & Mathematics ➔ Mathematics
If you are looking for the numbers of the theorems or axioms, various text books number them differently.
The axioms involved here are these:
Definition of perpendicular
Definition of congruent
Definition of supplementary
I would also use:
All right angles are congruent
Definition of adjacent.
Perhaps the transitive property of arithmetic
If you had a specific proof you were attempting, I could help you more.
2006-10-28 06:14:50 · answer #1 · answered by Uncle Bill 2 · 0⤊ 0⤋
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2006-10-28 12:35:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋