Helo wat is 9 plus tin plez help also you mom old like prehistoric dinosaur

Me find the measure to side a and the process to solve the problem you appreciate it : )

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a