Question

If quadrilateral ABCD rotates 90° counterclockwise about the origin, what are the coordinates of A′ in quadrilateral A′B′C′D′ ?

Answer 1

(2, 1)

(-2, -1)

(-2, -2)

(-2, 0)

Answer 2

sorry i suck with this stuff :(

Answer 3

but i will look

Answer 4

better have someone else look at it ;)

Answer 5

OA and OA' will be perpendicular

Answer 6

so the product of their slopes will be equal to -1

Answer 7

m1 = -2

so m2 = 1/2

and A' point will be in third quadrant .. only option 2 satisfy this.

and distance also remains the same .. which OA=OA'

Answer 8

distance from origin also doesnt change