a) Co-ordinates
b) Number of nodes
c) Rotational angle, θ
d) Area
Answer: c
Explanation: The point around which you rotate is called the center of rotation, and the smallest angle you need to turn is called the angle of rotation. The angle of rotation is a measurement of the amount, the angle, by which a figure is rotated counterclockwise about a fixed point, often the center of a circle.
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