Mis the midpoint of ab the coordinates of a are -2,3. the coordinates of m are 1,0 what’s the coordinates of b

Angle mno is s rotated 180 degrees counterclockwise about the origin to form angle m’n’o’. which statement shows the measure of angle m’n’o’?

I'll give brainliest if you answer right : )

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum