A. 4
to complete the square, take half of the the second number and square it
Answer:
Rotational symmetry of 180° about the origin: Yes.
Rotational symmetry of 270° about the origin: No.
Explanation:
A figure is a rotationally symmetrical if it look the same after a given turn.
We have to analyze if the parallelogram has rotational symmetry of 180° or 270°. picture the figure rotating a given amount of degrees to see if it looks the same or not.
180 degree rotation:
We can see that the figure looks the same after a 180° rotation.
270 degree rotation:
We can see that the figure does not look the same after a 270° rotation.
So the answer will be:
Rotational symmetry of 180° about the origin: Yes.
Rotational symmetry of 270° about the origin: No.
The shape goes through three transformations, and turns 180 degrees in total (flips). Therefore, each transformation is 180/3=60 degrees. The vertical of the L turns left in the first transformation, so that means that the L turns counterclockwise. The answer is 60 degrees counterclockwise.