A = B1 + B2/2 x H
First add the bases.
Base 1 (top) . 4 + 15 + 6 = 25.
Base 2(bottom) 15.
25 + 15 =40.
Next divide by 2
40 ÷ 2 = 20.
Last. Multiply by height.
The height of this trapezoid is 7in because the height must be perpendicular to the base. (NOT the SLANTED LINE)
20 x 7 = 140.
Don't forget the Units of measure!
Because this is area 140 in. = 140²