Which of the following vis not a needed piece of information when performing a rotation a) directionb) centerc) angle d) orientation

There's no concept of direction in a rotation. The direction is a concept proper of translation, where a vector (and thus its direction) defines the translation to apply to each point.

On the other hand, a rotation has a center, and you rotate by a given angle, in a given orientation (clockwise/counterclockwise).

D) Orientation

Step-by-step explanation:

A rotation is specified by its (Direction, Center, Angle). Unless you know these, you cannot do the rotation transformation. They are characteristics of the rotation transformation.

"Orientation" is a characteristic of the object. It has no relevance with respect to specifying a rotatation. (It is not altered by the rotation transformation.)

answer is 67%

step-by-step explanation:

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this