Which use of water has grown most dramatically since 1900

answer; gravity pulls glaciers down hill and as glaciers flow it pick up rocks and soil;

if he does not use open the compass the a width greater than half of po, he will not be able to find the midpoint of the line, without the midpoint of the line, he will not be able to bisect the line.   to find the midpoint of a line the circles drawn with a compass must either intersect or be touching.