If you have 8 feet long, there are two 8 foot sides on the quilt. Then, take 8+8 to find how much you've already used to get the other 2 sides. 8+8=16.
34-16=18. Then take 18 divided by 2 to find the measure of one of the two remaining sides. 18/2=9
so, the length is 8 feet and the width is 9.
To find area, take length x width
8x9=72
The area of the quilt is 72 feet