Question

what is theta and feta

Answer 1

While theta is a greek letter, commonly used as a variable for ANGLES,
feta means a white salty Greek cheese made from the milk of ewes or goats..

The other substitution for theta is phi which again is used as a measurement for angles...

Answer 2

hi,

» "∅" called theta. The eight letter of the Greek alphabet. It is use in solving mathematical problems. "ß" callrd beta. The second letter of Greek alphabet. It is also use in mathematical problems.
» Feta is a type of Greek cheese made from sheep's milk.