#2**+1 **

step by step explanation:

the angles on the inside of the pentagon=

\(180\times(5-2)=540\)

the angles on the inside of the trapezoid =

\(180\times(4-2)=360\)

7x360-360-540=

5x360-180=

1800-180=1620.

But we counted F and C as 360 + F and 360+c, so

1620-720=\(\boxed{900}\)

XxmathguyxX Jan 9, 2022