To obtain the area of a sector, what fraction is multiplied by the area of a circle (a = πr2)?

Ithink i know it but i want to be sure so can you me out ?

Apolygon is shown on the graph: a polygon is shown on the coordinate plane. vertices are located at 3 comma 5, 1 comma 3, 1 comma 1, 2 comma 0, 4 comma 0, 5 comma 1, and 5 comma 3. what effect will a translation 3 units down and 2 units left have on the polygon? be sure to address how it could impact the angles, side lengths, and congruency between the original pre-image and the image. xd i need

Change negative exponents to positive. then solve. round to four decimal places