so 3 feet up
4 feet away
this is makes a wire that is streached and the ground, tree and wire make a triangle
wire=longest side=hypotonuse
assuming that the angle made by the tree and the ground is a right angle
we have a right triangle with missing hypotonuse
so we use pythagorean theroerm where
a^2+b^2=c^2
a and b are legs
c=hypotonuse
we know that the legs are 3 and 4
subsitute
3^2+4^2=c^2
9+16=c^2
25=c^2
square root boht isdes
5=c
answer is 5 feet per tree
6 trees
5 times 6=30
30 feet needed
