So by asking google: how many meters in 100 yards. It comes back quickly with the answer 100 yards = 91.44 meters. A meter stick is just a bit longer than a yard stick, so a good guess is that 100 yards is just a bit fewer than 100 meters. Google's answer is consistent with that expectation.
Trochaic meter is a line of poetry composed of trochees. A trochee is a basic metrical unit called a foot consisting of two syllables. Derived from the Greek trokhaios ('falling, tripping'), this foot's name is representative of its falling rhythm, meaning a stressed syllable is followed by weaker ones.
A trochee foot is a stressed syllable followed by an unstressed syllable. We could write the rhythm like this: A line of trochaic octameter is eight of these in a row: We can scan this with a 'x' mark representing an unstressed syllable and a '/' mark representing a stressed syllable.