Answer:
x = sqrt(27)
Step-by-step explanation:
This is a right triangle, so we can use the Pythagorean theorem
a^2 + b^2 = c^2 where a and b are the legs and c is the hypotenuse
3^2 + x^2 = 6^2
9 + x^2 = 36
Subtract 9 from each side
9-9 + x^2 = 36-9
x^2 = 27
Take the square root of each side
sqrt(x^2) = sqrt(27)
x = sqrt(27)
