Yes.
Yes, 180 degrees. In the degenerate case that the parallelogram is a square, then 90 degrees.
Any shape with a rotational symmetry of order 2 or more.
No, a triangle does not have point symmetry. Point symmetry occurs when an object or shape remains the same after being rotated 180 degrees around a central point. In the case of a triangle, it does not have point symmetry because it does not look the same after a 180-degree rotation.
Of course. A reflection of any symmetric shape about a line perpendicular to its axis of symmetry will be a rotation of 180 degrees around the point on its axis of symmetry which is halfway between the pre-image and the image.
No, it does not.
A two-fold symmetry has a 360 degrees rotation. A three-fold rotational symmetry, on the other hand, has 120 degrees, and on a horizontal axis, a symmetry has 180 degrees.
Yes, 180 degrees. In the degenerate case that the parallelogram is a square, then 90 degrees.
Any shape with a rotational symmetry of order 2 or more.
No, a triangle does not have point symmetry. Point symmetry occurs when an object or shape remains the same after being rotated 180 degrees around a central point. In the case of a triangle, it does not have point symmetry because it does not look the same after a 180-degree rotation.
it has order two (180 degrees)
180 degrees because a full rotation is 360 degrees, if you take half of 360 you get 180 :)
Of course. A reflection of any symmetric shape about a line perpendicular to its axis of symmetry will be a rotation of 180 degrees around the point on its axis of symmetry which is halfway between the pre-image and the image.
If you mean "Does it have a rotational symmetry", the answer is "Yes." there is a 180 degree rotational symmetry.
Because 180 degrees clockwise is the same as 180 degrees counterclockwise.
No, it does not.
Yes, if you turn a shape completely around to its original position it will look like its original position because it will be in its original position. For example if i take a trapezoid and turn it 180 degrees it does not look the same as it did before so it does not have rotational symmetry of 180 degrees.
A line has 180 degrees rotational symmetry.