Answer:
Option B
Step-by-step explanation:
The slope of the line BC is,


Since AD is altitude to BC, we can say AD is perpendicular to BC, so the slope of the line AD which is perpendicular line to BC will be,

Switch the y and x then solve for y, so I believe b.
Answer:
1080°
Step-by-step explanation:
hope it's helpful
Hypotenuse AB = 20cm
Hope I helped!
Let me know if you need anything else!
~ Zoe