Answer: 22.7 in
Explanation:
find "a" using the pythagorean theorem
9.4^2 - 6.9^2 = a^2
88.36 - 47.61 = a^2
40.75 = a^2
6.4 ≈ a
p = a + b + c
p = 6.4 + 6.9 + 9.4 = 22.7
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