The area of a trapezoid is 8 square centimeters. If its upper bottom, lower bottom and height are doubled, how many square centimeters is its area

The area of a trapezoid is 8 square centimeters. If its upper bottom, lower bottom and height are doubled, how many square centimeters is its area

Top, bottom and height: A, B, H
s=1/2*(a+b)*h
1/2*(2a+2b)*2h=4*1/2*(a+b)*h=4s
4*8=32
Its area is 32 square centimeters