its an math formula like a tringle that has 1 side length is 5 and the other is 6 and u dont know wat is the 3rd one u use this formula
C2=a2+b2
C2=52+62 By the way the 2 is an exponent
c2=25+36
C2=61
c2=61 into a square root wich = to 7.8012
this is how u figure out the missing side for a tringle