Answer:
60
Step-by-step explanation:
All the angles in that triangle are the same due to the type of triangle.
Median is 6 so your answer is C
x = 6 ± √30
x² + 2( -6)x + 36 = - 6 + 36
(x - 6)² = 30 ( take the square root of both sides )
x - 6 = ± √30 ( note plus or minus )
add 6 to both sides
x = 6 ± √30 ( exact solutions )