Is line p perpendicular to line r?
What does that little box in the corner mean?
Yes, p ⊥ r.
Is line q perpendicular to line r?
Remember that p and q are parallel lines. What are some characteristics of parallel lines?
Yes, q ⊥ r.
Which of these lines are parallel and which are perpendicular?
"Parallel" and "perpendicular" are kind of the opposite of one another.
b ⊥ c, d ⊥ c, and b || d
What is the measure of ∠RZQ?
Vertical angles are always what?
If the measure of ∠UYZ is 19°, what is the measure of ∠WYP?
Knowledge of vertical angles and perpendicular lines is equally useful.
Which lines are parallel? Which lines are perpendicular?
What can you prove based solely on the picture?
We can only prove that e ⊥ g and f ⊥ h.
The equation of line a is y = -⅕x – 1. If line b is perpendicular to line a and intersects line a when x = 5, what is the equation of b?
To find a line, we need the slope and a point. We're given both…somewhat indirectly.
The equation of line b is y = 5x – 27.
Make it rain.