Exercise # 1: Use coordinate geometry to prove that triangle ABC is isosceles , given A(- 2, 3) , B(- 5, - 4) and C(2, - 1) .

1e+27

step-by-step explanation:

step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6

jbankston is right, use thhe link and you should find the answer.