Question

Could someone help me rotate this trapezoid? It seems easy enough to do rotations in geometry, but I'm still not sure what exactly what to do for this particular problem.. even though I drew it out..

Here is the problem..


Given 4 coordinate points A(2, 0), B(4, 0), C(5, -2), D(1, -2), type the answer for the image that is rotated by 180° about the origin O.

A' = (_ , _ )

B' = (_ , _ )

C' = (_ , _ )

D' = (_ , _ )

Answer 1

That is the drawing.

Answer 2

like this perhaps?

Answer 3

Maybe..

Answer 4

@precal thanks. I will try to plot out the coordinates for that and see what I get.

Answer 5

if you have tracing paper, that might work.

Answer 6

or use parchment paper

Answer 7

Well, I don't (sheepish look on face) but that is a good idea. :)

Answer 8

how about plastic, you need something you can see through, use a sharpie if you can

Answer 9

http://www.mathsisfun.com/geometry/rotation.html
try this, maybe it can help, put it in as a triangle

Answer 10

something like it, maybe one at a time

Answer 11

Thanks!

Answer 12

hope it works :)

Answer 13

When rotating \(180^\circ\) about the origin, simply negate ALL of the coordinates to return the transformation. In symbols:\[(x,y) \mapsto (-x,-y)\]