What is the length of AB? 12 units
6
14 units
4
2
6 units
-8
4
-20
4
-2
10 units
4
.A
-6
-8-

false

step-by-step explanation:

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.