Im on a time i don't understand ! if line ba is congruent to line ca, which of the following is true: 1) line gf is congruent to line he 2) triangle edf is congruent to triangle gdh 3) line gf is congruent to line ef 4) line ed is congruent to line dh

1) Line GF is congruent to line HE

That means that they're equal, in this case they're equal about the size, they pass through the same point (D), and they're on the same position horizontally, in the start and end. I think its that.

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.