Answer:

Step-by-step explanation:
Given : The formula for the area of a trapezoid with altitude k and bases m and n is 
We have solve for m .
Consider the given formula 
Multiply both side by
, we have,

Now subtract n both side, we have,

Thus, 
Answer: what are the choices
Step-by-step explanation:
B because pie radius square = area of a circle
Plain Z<span> is the </span>plane<span> that is width basicly if looking at a 3d figure.</span>