Answer:
B. 3 (square root) 2cm
Step-by-step explanation:
using pythagorean theorem
a^2 + b^2 =c^2 where a and b are the legs and c is the hypotenuse
3^2 + 3^2 = c^2
9+9 =c^2
18 = c^2
take the square root of each side
sqrt(18) = sqrt(c^2)
sqrt(9 *2) = c
sqrt(9) sqrt(2) = c
3 sqrt(2) =c
