Consider the diagram below.
3.5 in
2 in.
For the above circular shape, chord FE is a perpendicular bisector of chord BC. Which of the following
represents the diameter of the circle?

C. 8.1

I just got that one wrong, but there is the right answer

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

answer: what are the following choices