Help me answer this question plz!!!!

Answer:
8,670
Step-by-step explanation:
area of a trapezoid is
[tex]\frac{a+b}{2} h[/tex]
the lengths you add together
you then divide that answer by two
then you multiply that answer by the height
102 + 102 = 204
204 ÷ 2 = 102
102 x 85 = 8670