LISTEN UP!
You ask us about the line AR, but you still haven't told us anything about point R!!!
Where is it, in relation to ABC?
Given triangle ABC with A(-3, 2), B(-1, -4), and C(4, 1), write the equation for the line containing altitude line AR in standard form.
A. x - y = 1
B. x + y = -1
C. x + y = 1
D. x - y = -1
I can't figure this out at all. It's been confusing me for a long time now. I really need help, it's my very last question and I have to get this done. Any help would be appreciated!
4 answers
Sorry I yelled. I missed the word "altitude" in there.
I'll solve it in my next post.
I'll solve it in my next post.
The altitude AR is perpendicular to the line BC.
BC has slope 1, so AR has slope -1
The line through A(-3,2) with slope 1 is
y-2 = -(x+3)
x+y = -1
BC has slope 1, so AR has slope -1
The line through A(-3,2) with slope 1 is
y-2 = -(x+3)
x+y = -1
Steve is right! I asked my math tutor...
1 answer