In the coordinate plane, the vertices of triangle PAT are
P(-1,-6),A(-4,5)
, and
T(5,-2)
. Prove that
/_(/)PAT
is an isosceles triangle. [The use of the set of axes below is optional.] State the coordinates of
R
so that quadrilateral
PART
is a parallelogram. Prove that quadrilateral
PART
is a parallelogram.