Answer:
The area of Ciro's sign = 503.5 square inches
Explanation:
Ciro made a sign in the shape of a trapezoid.
The parallel sides measured 18 inches and 35 inches
The distance between these sides was 19 inches, such that the height of trapezoid.
The area of Ciro's sign = Area of trapezoid =

=

The area of Ciro's sign = 503.5 square inches