What are the five guidelines to scansion?

The last foot (the anceps) always consists of two syllables so mark it so immediately. You can

regard the very last syllable as an unknown vowel length and mark it as an X (it will normally be

pronounced long no matter what)

2. The second to last foot is almost always a dactyl so mark it so immediately

3. The first syllable of every line of poetry is long no-matter-what so mark it so immediately.

4. The thesis (first syllable) of a foot is always long

5. The arsis (the second half) of a foot will either be one long or two shorts: there can be no

mixing and matching in the second half of the foot

Explanation:

the answer is

r ≈5.641

plug in the area of 100 yards into the equation

100=

divide each side by pi

≈ 31.8309=

take the square root of each side to find r

=r

r ≈5.641