Question

The plate is rotated 90° about the origin in the counterclockwise direction. In the rotated trapezoid, what are the coordinates of the endpoints of the side congruent to side FG?

(7, −5) and (4, −3)
(5, 7) and (3, 4)
(−5, −7) and (−3, −4)
(−5, −7) and (−8, −4)

Answer 1

same logic as last time

point G is (-4,3) right

apply the transformation (-y,x) to get the new location of G

there's only one choice that includes the new coordinates of G

Answer 2

I don't know

Answer 3

(-4,3) means x = - 4 and y = 3 right?

then what is (-y, x) equal to?

Answer 4

is going to be
4,-3

Answer 5

if y = 3 then -y = ?

Answer 6

-3

Answer 7

good so (-y,x) = ?

remember the -y comes first

Answer 8

ok

Answer 9

so if the -y comes first then the first coordinate is -3, right? and the second coordinate is x, or -4

so (-3,-4) are the new coordinates of G

which makes the only possible answer choice...?

Answer 10

thanks