Quadrilateral defg has vertices d(−2,4) , e(4,7) , f(10,3) , and g(8,0) . what are the coordinates of d′e′f′g′ after quadrilateral defg has undergone a rotation 270° counterclockwise about the origin? enter your answers, as ordered pairs (x, y) , in the boxes.

A rotation 270° counterclockwise about the origin is the same as rotation 90° clockwise about the origin and has a rule:

(x,y)→(y,-x).

Then:

the coordinates of vertices of quadrilateral D′E′F′G′ are D'(4,2), E'(7,-4), F'(3,-10), G'(0,-8).

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