The Phi Phi islands are found in Thailand. They are located between another island, Phuket, and the Andaman sea to the west. They belong to the Krabi province of Thailand.

Thailand is comprised of over 1,400 islands, with popular ones including Phuket, Koh Samui, and Phi Phi Islands.

phi

Delta Phi was created on 1827-11-17.

(a+b)/a=a/b=phi (the golden ratio, as defined)

(a+b)/a=phi (we'll solve this equation)

1+b/a=phi (just changing the form of the left side a little)

1+1/phi=phi (a/b=phi so b/a=1/phi)

phi+1=phi2 (multiply both sides by phi)

phi2-phi-1=0 (rearrange)

From here, we can use the quadratic equation to find the positive solution:

phi=(-b+√(b2-4ac))/(2a)

phi=(1+√(1+4))/2

phi=(1+√5)/2≈1.618