Question

Three yachts are anchored on the harbor as shown below.
How far is Yacht 2 from the harbor?

Answer 1

Hint: the big right triangle, and the two smaller ones are all similar to each other

Answer 2

do i need to use the pythagoram theorem?

Answer 3

no ... you can avoid it

Answer 4

if you focus on the smaller triangles

Answer 5

yeah there is a 90 degrees angle ther

Answer 6

using the left triangle is similar to the right one:
\[\Large {81 \over x}={x \over 49}\]