Apply the ruler postulate
measure the length of st to the nearest tenth of a centimeter.
solution
align one mark of a metric ruler with s. then estimate the coordinate of t.
for example, if you align s with 2, t'appears to align with 5.4.
6
tom 1
st = 15.4 - 2) = 3.4
2 3 4 5
use ruler postulate.
the length of st is about