Question

could use some assistance

Answer 1

so you know that r=20 and h = 16 so how many is d ?

than you know that 3,4 and 5 are pythagorean triplets and in this case there are

20=5*4
16=4*4
x = 3*4

what mean that x so in this case d= 12 m so choice C. is right sure

hope this will help you sure easy understanding

Answer 2

\(r^2=h^2+d^2\\d^2=r^2-h^2\\d\;=\sqrt{r^2-h^2}\)