Question

What is the distance between points S and U?



A.
3.3 units

B.
6.4 units

C.
8.1 units

D.
12.0 units
http://static.k12.com/calms_media/media/1578500_1579000/1578504/1/50542fc45dd47e17064a90ebe1c189b8905017bb/MS_IMC-150122-130508.jpg

Answer 1

You would use the distance formula.
http://www.purplemath.com/modules/distform.htm

So you're looking at
\[\sqrt{(x _{2}-x _{1})^{2}+(y _{2}-y _{1})^{2}}\]

Use point (2,1) as 1 (So 2 for x1 and 1 for y1)
and point (6,8) for 2 (So 6 for x2 and 8 for y2)

And solve.