Answer:
The length is 312ft.
Explanation:
Pythagorean Theorem!
a² + b² = c²
The hypotenuse is c, and the diagonal line is the hypotenuse.
we will replace b or a with 266, it doesn't matter, as long as the length is not whichever one I choose. I will replace b with 266. Now w know that the height is a.
a² + 266² = 410²
Use calculator
a² + 70756 = 168100
168100 - 70756 = 97344
√97344 = 312
The length is 312ft.