Problem 3 Square A is smaller than Square B. Square B is smaller than Square C.

There are 3 differently sized squares labeled, from left to right, “A,” “B” and “C.” The squares are arranged from smallest to largest, so that “A” is the smallest square and “C” is the largest.
The three squares’ side lengths are 26⎯⎯⎯⎯√, 4.2, and 11⎯⎯⎯⎯√.

What is the side length of Square A? Square B? Square C? Explain how you know.