turn one quarter of the way.
A square has 4 right angles. Right angles are 90 degree angles.4*90 degrees = 360 degrees
Square = 90 degrees Pentagon = 72 degrees
{1 0} {0 -1}
A right angle is 90 degrees. The square root of a right angle would be the square root of 90, which is 9.486.
I dOnt now
rotate it 90 degrees
It rotates 90 degrees.
Yes
yes
To describe a shape's rotational symmetries, you would write the angle. For example, let's use a square. If you rotate a square 90 degrees, it will look exactly the same, and 180 will be the same too, so a square's rotational symmetries are 90 and 180 degrees.
90 degrees
The text will rotate 90 degrees to the right. The beginning of the text will be at the top. If you rotate another 90 degrees, the text will display upside down.
Yes
you open it with a picture editor, rotate it 90 degrees and save it.
A square.
It goes right round 360 degrees in 24 hours, so 6 hours for 90 degrees, relative to the Sun. Relative to the distant stars, it takes the Earth about 5 hours, 59 minutes to rotate 90 degrees.