Answer:
Step-by-step explanation:
a^2 + b^2 = c^2
3.2^2 + b^2 = 18.9^2
10.24 + b^2 = 357.21 Subtract 10.24 from both sides
b^2 = 357.21 - 10.24
b^2 = 346.97
sqrt(b^2) = sqrt(346.97)
b = 18.62
Perimeter = 2*a + 2*b
Perimeter = 2*3.2 + 2*18.62
Perimeter = 6.4 + 37.25
Perimeter = 43.65
