Answer:
It was the "bare legs" that got my attention. I'm still looking, but will answer the question in the meantime.
c = 8.602
Explanation:
The Pythagorean Theorem tells us that
a = 5. b = 7, so:
5^{2} + 7^{2} = c^{2}
25 + 49 = c^{2}
c^{2} = 74
c = 8.602
================================
I don't know how to interpret the rest of the post:
"ОА
c=74
OB
c=37
с
c=2137
c=174"
????
I see the bare legs now. Gotta go.