Prove that triangle AEB is equal to Triangle DCE

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

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x