Which side lengths form a right triangle? Choose all answers that apply:
Choose all answers that apply:

(Choice A)
A
9, 12, 159,12,159, comma, 12, comma, 15

(Choice B)
B
2, 6, \sqrt{38}2,6,
38

2, comma, 6, comma, square root of, 38, end square root

(Choice C)
C
3, 9, \sqrt{91}3,9,
91

Def is a scalene triangle

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.