Answer:
Step-by-step explanation:
In order to find the value of y, first we need to find the length of the perpendicular dropped from one of the vertices of the triangle to its opposite side.
By geometric mean theorem:
Length of the perpendicular
Next, by Pythagoras theorem:

S=-1 see attachment for explanation
Ninty three point six five I think
15/20 and 16/20
4/5 or 16/20 is greater
Yes I think it really is the correct answer