Prove that if two nonvertical lines have slopes whose product is -1 then the lines are perpendicular.
Question:
Prove that if two nonvertical lines have slopes whose product is -1 then the lines are perpendicular. Refer to Figure 47 and use the converse of the PythagoreanTheorem.
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Figure 47 Now consider the equation If this equation is valid then AOB is ...View the full answer
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