You are on the west coast of the United States where there has been a subduction zone. Which lava would you expect to come out of Mount Saint
Helen?
a. mafic
b. ultramafic
c. intermediate to felsic

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.