Question

What is the area of the trapezoid if DC = 4x and AB = 2x and the height is (3x + 1)?
A)
9x2 + 3


B)
9x2 + 3x


C)
18x2 + 6x

D)
24x2 + 8x2

Answer 1

area of trapezoid = 1/2 (AB+DC) x h

 = 1/2 (4x+2x)(3x+1)
= 1/2 (6x)(3x+1)
= 3x(3x+1)
= 9x^2 + 3x

Answer is B