Question

How many degrees must Figure A be rotated counterclockwise around the origin in order to line up with Figure B?A. 90B. 180C. 270D. 360

Answer 1

Answer:

B. 180

Explanation:

One of the vertexes of figure A is at (1,1)

Its corresponding vertex in Figure B is at (-1,-1).

When a figure is rotated 180 degrees counterclockwise around the origin, we have the transformation rule:

$(x,y)\to(-x,-y)$

Thus, we see that Figure A is rotated 180 degrees counterclockwise.

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