Answer:
See explanation
Step-by-step explanation:
The question is incomplete as the required trapezoid is not given. SO, I will answer using genera rules.
The area of a trapezoid is:

Where
parallel sides

Assume that:

The formula becomes



This is what I got hope it helps!
Answer:
21
Step-by-step explanation:
dog = 35/85 = x/51
=> x = 35 x 51 / 85 = 7 x 51 / 17 = 21