Can someone me understand why the 1/2 turns into sqr root of 2 / 2

What is the length of bc ? enter your answer in the box.bc =

An apartment has a replacement cost of $950,000 and contents valued at $1,450,000. it has a classification of a and a territory rating of 3. find the annual premium a) $10,185 b) $9,230 c) $3,155 d) $13,830

Select the graph of the solution. click until the correct graph appears. |x| = 3