Slopes of Parallel and Perpendicular Lines
To complete these notes, go to
tinyurl.com/jnzrmea
Use the following username and password:
Username: Austinhs
Password: maroons
Example 1) Determine the slope of
⃡ .
𝐴𝐵
⃡ .
Example 3) Determine the slope of 𝐴𝐶
Example 2) Determine the slope of
⃡𝐶𝐵 .
Slope of Parallel Lines
Slope of Perpendicular Lines
Two non-vertical lines have the same slope if and only if
those lines are parallel.
Two non-vertical lines have opposite reciprocal slopes if
and only if those lines are perpendicular.
Parallel line have the same slopes.
Perpendicular lines have opposite reciprocal slopes.
⃡ .
Example 4) Determine if ⃡𝐴𝐵||𝐶𝐷
⃡ .
Example 5) Determine if ⃡𝐴𝐶 ||𝐵𝐷
Example 6) Determine if ⃡𝐴𝐵 ⊥ ⃡𝐵𝐷.
Go to, tinyurl.com/pxxga4z. Call for a stamp when you have a smart score of at least 70.