Pls help the following question;
The centroid (centre) of an object is the average of its x and y coordinates. A pentagonal object has vertices as follows;
Vertex A B C D E
Coordinates (1,2) (4,2) (5,5) (4,6) (2,5)
a) Calculate the centroid of the pentagon
b) Find M, the 3x3 matrix that scales the pentagon by a scale factor of 2.5 about ist centroid
Thank you very much.