What is the missing constant term in the perfect square that starts with x2 -20

Which of the following shows the length of the third side, in inches, of the triangle below

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?

Line segment eg is partitioned by point f in the ratio 1: 1. point e is at e (0, 4), and point f is at (1, 3). what are the coordinates of point g? (−1, 5) (2, 2) (3, 1) (4, 0)