# Thread: [SOLVED] Finding a length

1. ## [SOLVED] Finding a length

Hi

How do i actually find the length of the line at the middle???

2. Originally Posted by xwrathbringerx
Hi

How do i actually find the length of the line at the middle???
your pic is too small to see, but I can tell you that the length of a midsegment of a trapezoid equals the average of the two bases.

3. Sorry I didnt notice..

The longer length is 19 m and the shorter 14 m

I tried finding the average but I got 16.5 m instead of 16 like in the answers...

Oh, and the middle line separates the trapezium's top part into lengths of 60 m and 40 m (if that helps)

4. Originally Posted by xwrathbringerx
Sorry I didnt notice..

The longer length is 19 m and the shorter 14 m

I tried finding the average but I got 16.5 m instead of 16 like in the answers...

Oh, and the middle line separates the trapezium's top part into lengths of 60 m and 40 m (if that helps)
then it's not in the middle, is it?

5. area of right trapezoid + area of left trapezoid = area of large trapezoid

let b = interior base length

20(14+b) + 30(b+19) = 50(14+19)

solve for b, the unknown base.