One ring in the Stonehenge monument was originally made of 30 stones, each about 6.5 feet wide, 3 feet thick, and 13 feet tall. What is the approximate volume of the 17 stones that remain today?

ddd

step-by-step explanation:

other answer is correct. i had used the radius of the radius somehow. a website:

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.