Which of the following materials is not used when making basic constructions a. ruler b. compass c. straightedge d. pencil

The compass is the material that is not used when making basic constructions.

To add, the compass is an instrument containing a magnetized pointer that shows the direction of magnetic north and bearings from it. Also, the remaining items in the choices are used to measure length and alignment, which are essential in basic constructions.

33/100 is what i got

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.