Missing side length is ten!!
Given the quadratic equation, (x + 2)^2 = a.
And, x = 1
Solving for the value of a
(x + 2)^2 = a.
a = (x + 2)^2
a = (1 + 2)^2
a = 3^2
a = 9
The value of a is 9
the hypotenuse is equal to twice the length of the shorter leg, which is the side across from the 30 degree angle. the longer leg, which is across from the 60 degree angle, is equal to multiplying the shorter leg by the square root of 3. so quite basically, hypotenuse = short leg square root, long leg = short leg squared :3 ( ex: short leg is 2 , 2^2 = 4, 2^3= 6 )
I believe the second choice is the correct answer. :)