Asked by Haizif Khan

Find x so that the triangle with vertices A=(4, 4, −2), B=(2, −1, −5), and C=(x, 14, −6) has a right angle at A.
Answered by hi
heyy i have a question!!
Answered by hi
can u pls look on the newest thing on here and look at my question. its social studies and the name is still hi. I NEED SO MUCH HELP!!!!!!
Answered by oobleck
as with the other question just like this one, you want AB•AC = 0
So,
(2-4)(x-4) + (-1-4)(14-4) + (-5+2)(-6+2) = 0
x = -15
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