Question

I always get terribly confused on these, please show work?

Answer 1

You are finding the square root of 121
*the answer is 11*
because if you times 11 by its self you get 121

Answer 2

I'll try my best to explain this.

First off, and equilateral triangle is just a triangle with 3 equal sides.

For the
$\sqrt[m]{n}$
You just plug in the numbers you're given (m=2 and n=121) So your equation would look like this
$\sqrt[2]{121}$
Which means the square root of 121. So really the question is simply asking for
$\sqrt{121}$
Your answer would be 11.