9th grade math help - 2 questions on rotating/reflecting shapes on a graph please

I'm not too sure how to do this:

find the coordinates of the vertices of each figure after the given transformation.

11. rotation 180 degrees about the origin.
E(2, -2), J(1, 2), R (3,3) S (5,2)

12. reflection across y=2
J(1,3), U(0,5) R(1,5) C(3,2)

Thank youuuuuuu! (:

Assuming you know how to plot co-ordinates, the "Origin" is 0,0 so just rotate the shape 180 degrees round the center, if you are having trouble a good tip is to get some tracing paper, trace the shape on, put your pen on 0,0 and turn the paper round 180 degrees.

and y=2 is the vertical line crossing through 2 on the horizontal axis just flip the shape across it by counting the amount of points from the line to the corner, then mirror it on the other side.

and for the extra credit question, X=Y is a diagonal line going bottom left to top right, again just count the points from the corner to the line then mirror it on the other side.

Hope i helped

For the extra credit one, just switch the x and Y coordinates, and it will give you the reflection across the line y=x

Report Abuse