Answer:
C. 6√55
Step-by-step explanation:
The triangle given is an isosceles triangle that is divided into two equal parts by a segment.
Thus, we can apply pythagorean theorem to find x.
x = 2 × √(24² - 9²)
x = 2 × √495
x = 2 × √(9 × 55)
x = 2 × 3√55
x = 6√55
