## anonymous 5 years ago Use the distance formula to decide whether PQ=QR P(-4,3) Q(-2,1) R(0,-1)

1. anonymous

$\sqrt{(y _2-y _1)^2+(x _2-x _1)}$

2. anonymous

^2

3. anonymous

they are equal

4. anonymous

D$d^2 = \sqrt{(x _{p} - x _{q})^2 + (y _{p}-y _{q})^2} for PQ = d^2 =\sqrt{-2^2 +2^2 } \ \[= \sqrt{8}$ so, now do the same thing for the segment RQ and compare...