Carl knows that the area of a given circle is 400 cm2. he wants to defend an informal argument that the area of a circle can be approximated by dividing the circle into congruent segments, rearranging the segments to resemble a parallelogram, and replacing the dimensions of the parallelogram with appropriate values from the circle. carl divides the circle into 6 congruent segments and makes his calculations, but the area he calculates for the circle is only 350 cm2. how could carl defend his informal argument?