Question

Abcd is rotated counterclockwise about the origin.By how many degrees was abcd rotated?

Answer 1

Answer:

The rotation is 270 degrees counterclockwise

Step-by-step explanation:

Given

See attachment

Required

Degrees of rotation

From the question, the rotation is counterclockwise

Using point B and B' as points of reference.

$B =(2,5)$

$B' =(5,-2)$

The rule that supports the above is: rotation by 270 degrees counterclockwise.

Because the rule is:

$(x,y) ==>(y,-x)$