The prime factorization number is 280 I got 2.2.5.7
You can’t? I mean like adding 100 at a time or-
We will have to use the formula for the area of a trapezoid on this problem, which is (
and
are the bases of the trapezoid and
is the height):

All we need to do is substitute the information we are given into our formula:

Now, let's just simplify the equation:




The missing base has a length of 13 units.