Which set of segment lengths could be used to construct a triangle?
2,12,19
4,7,13
4,5, 12
13, 2, 12

Hey bby was a good way i just got

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.