Respuesta :

Answer:

Length of 2nd leg is 8.7m.

Step-by-step explanation:

a^2 + b^2 = c^2

Substitute.

5^2 + b^2 = 10^2

Solve.

25 + b^2 = 100

100 - 25 = 75

sqrt(75) = 8.66

Round.

8.66 ---> 8.7.