Q:

in the figure LMV is similar to UTK. what's the value of x the length of side LM?​

Accepted Solution

A:
To solve this problem, all we need to do is just set up a proportion. The two shapes are similar, which means that they are the same shape, but different sizes. Using the wording/letter arrangement in the problem, we can figure out which side of one triangle corresponds to which side of the other triangle.Triangle LMV (with segments LM, MV, and VL) is similar to triangle UTK (with segments UT, TK, and KU).Corresponding pairs: LM(x) : UT(39)MV(30) : TK(65)VL : KUHowever, we need only be interested in the first two pairs. Here is the proportion with letters:LM / UT = MV / TKand as numbers:x / 39 = 30 / 65Solve for x:x / 39 = 30 / 65Cross multiply:(x)(65) = (39)(30)Simplify:65x = 1170Divide:65x/65 = 1170 / 65Simplify:x = 18Answer:The length of side LM (x) in triangle LMV is 18 units.